Continuum Precision II Series Operation And Maintenance Manual
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Continuum Precision II Series Operation And Maintenance Manual

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Operation and Maintenance Manual
Operation and Maintenance Manual
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Precision II Series Lasers
996-0255
rev. b
i
996-0255 rev. b

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  • Page 1 Operation and Maintenance Manual Operation and Maintenance Manual for the Precision II Series Lasers 996-0255 rev. b 996-0255 rev. b...
  • Page 2 Precision II Operation and Maintenance Manual Copyright 1993, 1997, 2000 & 2001 by Continuum. All right reserved. Printed in the U.S.A. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a data base or retrieval system without the prior written permission of Continuum.
  • Page 3 The voltage setting on the PU600C series power units at the time of installation, may NOT be exceeded without consulting the Continuum Service office first. Exceeding the designated voltage can result in free-running (see Section II), thermal focusing and optical damage. Failure to follow these precautions will result in voiding the warranty (see Section VII).
  • Page 4 Precision II Operation and Maintenance Manual 996-0255 rev. b...

  • Page 5: Table Of Contents

    Operation and Maintenance Manual Table of Contents Chapter I Laser Safety Precautions, rev. b Government and industry regulations ..............1-1 Laser safety precautions ....................1-1 Optical safety ........................ 1-2 Electrical safety ......................1-2 Laser emission classification ..................1-3 Protection while working with lasers ................ 1-3 Additional safety regulation references ..............
  • Page 6 Precision II Operation and Maintenance Manual Chapter IV Maintenance, rev. b A. Cleaning optics ......................4-1 B. Flashlamp removal & replacement ............... 4-2 C. Rod replacement ...................... 4-4 D. Replacing the DI water filter .................. 4-7 Bacterial growth ....................4-8 E.
  • Page 7 Fourth harmonic position ..................2-9 Precision series chronograph .................. 2-12 External Trigger Panel (ETP) ..............2-14 & 3-6 Physical dimensions Precision II series ..............2-25 Optical layouts of Precision II 9000 ............. facing 3-1 Flashlamp details ...................... 3-2 Exploded head drawings ................... 3-3 & 4 Top &...
  • Page 8 Waterflow diagram ....................3-89 Cooling requirements 50Hz ................... 3-90 System maintenance schedule ............... facing 4-1 Troubleshooting guide for Precision II series............5-1 Electronic rack troubleshooting flow chart.............. 5-2 Optical troubleshooting chart................5-3 & 4 Precision II series chronograph................5-5 Burn pattern diagram.
  • Page 9 Chapter 2 describes operating instructions for the Precision II series lasers. A brief installation description is given at the end of the chapter. Installation of this laser may only be performed by a Continuum cus- tomer engineer. Chapter 3 describes the electronic modules and how they work in detail.
  • Page 10 Appendix gives our warranty and phone numbers. An Index is provided at the end of the manual. Related Documents Continuum Documents: Operator’s Manual for the Continuum NY80 Series Pump Laser, COM 996-0155. Operator’s Manual for the Continuum NY60 Series Pump Laser, COM 996-0156.
  • Page 11 Chapter I Laser Safety Precautions Contents Government and industry regulations ............ 1-1 Laser safety precautions ................ 1-1 Optical safety ..................1-2 Electrical safety .................. 1-2 Laser emission classification ..............1-3 Protection while working with lasers ............1-3 Additional safety regulation references ..........1-3 Warnings and labels ...............
  • Page 12 996-0255 rev. b...

  • Page 13: Chapter I

    Chapter I Laser Safety Precautions Government and industry regulations Continuum’s user information is in compliance with section 1040.10 of 21 CFR Chapter I, Subchapter J concerning Radiological Health published by U.S. Department of Health & Human Services Center for Devices &...

  • Page 14: Optical Safety

    Precision II Operation and Maintenance Manual This laser equipment must be turned off when not in use. Always wear laser goggles appropriate for the wavelength generated and the beam intensity. The laser equipment area must be brightly lit so the pupils of the operator’s eyes are normally constricted.

  • Page 15: Laser Emission Classification

    When the laser beam is active, there are shutters that cut the beam off, or reduce the intensity of the beam at the Precision II output. A shutter at the output of the Precision II series pump laser cuts off the laser beam.

  • Page 16: Precision Ii Warning Labels

    Found inside power units on heat sinks, DANGER HIGH VOLTAGE capacitors & 24V power supplies. Also, on rear Access limited to panels of control units and cooling groups. authorized Continuum Service personnel only. Item 6 P/N 310-0022 Found on the covers of the control and power units, and capacitor banks.
  • Page 17 Visible and/or invisible laser DANGER Visible and invisible laser radiation radiation when open. CAUTION HIGH VOLTAGE when open and interlock defeated. AVOID EYE OR SKIN EXPOSURE TO AVOID EYE OR SKIN EXPOSURE BEFORE WORKING ON THIS UNIT TO DIRECT OR SCATTERED DIRECT OR SCATTERED RADIATION.
  • Page 18 AVOID EXPOSURE Invisible and/or Visible laser radiation is emitted from this aperture. 310-0040 REV C front Continuum Electro - Optics, Inc. 3150 Central Expressway, Santa Clara CA 95051 MODEL DATE CAUTION This laser product complies with 21 CFR Chapter 1, Subchapter J, and EN-60825-1.
  • Page 19 Chapter I – Laser Safety Precautions CAUTION HIGH VOLTAGE BEFORE WORKING ON THIS UNIT ITEM 6 SWITCH OFF POWER SUPPLY DISCONNECT ALL PLUGS Continuum Electro - Optics, Inc. ITEM 3 3150 Central Expressway, Santa Clara CA 95051 MODEL DATE This laser product complies with 21 CFR Chapter 1, Subchapter J, and EN-60825-1.
  • Page 20 Precision II Operation and Maintenance Manual security hinged cover interlocks light Continuum Security interlock location diagram external cover. item 1 on surface With the cover open, the of laser bench. interlock defeat bracket can be installed over the security switches.
  • Page 21 KONFORMITÄTSERKLÄRUNG 96 DECLARATION OF CONFORMITY 96 DÉCLARATION DE CONFORMITÉ 96 Continuum Scientific Nous Continuum Scientific Continuum Scientific 3150 Central Expressway 3150 Central Expressway 3150 Central Expressway Santa Clara, CA 95051, U.S.A. Santa Clara, CA 95051, U.S.A. Santa Clara, CA 95051, U.S.A.
  • Page 22 Precision II Operation and Maintenance Manual 1-10 996-0255 rev. b...
  • Page 23 RS232 specification/baud rate & signals ......page 2-17 c) RS232 signals ............... page 2-17 d) Host computer example program ......... page 2-18 F. Installation ..................page 2-22 Physical dimensions Precision II series ........page 2-25 1-11 996-0255 rev. b...
  • Page 25 seeder telescope 8000 seeder 1064 355 or 266 residual 532 & 1064 THG or Legend for Precision 8000 1. Mirro r, rear, (rep rate 6. Output coupler, (rep rate 12. 812V-09 head, 507-0900 dependent) dependent) rod, 9mm, 201-0005 2. Pockels cell, 202-0003 7.
  • Page 27 seeder telescope 8020 seeder 1064 355 or 266 residual 532 & 1064 THG or Legend for Precision 8020 1. Mirror, rear, (rep rate 6. Output coupler, (rep rate 12. 812V-09 head, 507-0900 dependent) dependent) rod, 9mm, 201-0005 2. Pockels cell, 202-0003 7.

  • Page 29: Chapter Ii System Operation, Rev. B

    SHOT COUNT RB601 keyboard Press the AUTO/MANUAL key on the RB601 and then press the START key. Continuum 7) The system will cycle to programmed mode #1 (PGM1) for system warm-up. The laser heads should now be flashing at charging...

  • Page 30: Shutdown Procedure

    Precision II Operation and Maintenance Manual 10) Select desired programmed mode of operation by press- ing the PROGRAM UP key on the RB601. 11) Once the PGM is located press ACTIVATE key to engage the desired PGM. 12) For lasers with the SI-500 option (Seeded SLM), flip the shutter switch to the OPEN position on the seed laser's control panel .

  • Page 31: Programming The Rb601 Remote Box

    Chapter II – System Operation C. Programming the RB601 remote box Through the RB601 you can access a total of 16 Programmed Modes (PGM). The first 3 PGM’s are set at the factory and cannot be changed. The remaining 13 PGM’s can be programmed by the user. PGM-1 is used for system warm-up.

  • Page 32: Options

    (1064 nm). For more information on harmonic generation, see W. Koechner’s Solid-State Laser Engineering published by Springer-Verlag, Chapter 10. Abbreviations used for Continuum’s harmonics are as follows: Second Harmonic Crystal Type I KD*P Second Harmonic Crystal Type II KD*P...
  • Page 33 Chapter II – System Operation port 1 (closed) port 2 Second harmonic port 3 position. b. Carefully align guide pins to the holes on the face plate and then press the crystal housing firmly against the crystal face plate. c. Slide the locking lever on the face plate to secure it to the crystal housing.

  • Page 34: Connecting Harmonic To Face Plate

    Precision II Operation and Maintenance Manual guide pin locking lever brass locking pins contacts Connecting harmonic to face plate through the SHG and out of port #3, and the alignment of the 532 nm through port #2 (see drawing above) . To reduce power: a.

  • Page 35: Third Harmonic Generation

    Chapter II – System Operation Third harmonic generation For performance parameters at 355 nm , see the data sheet in the front section of the manual: Polarization >95% horizontal Input Polarization 1.06 4 µ horizontally polarized, 532 vertically polarized. Install the Second Harmonic Generator (SHG) Type I, labeled DSI. See procedure below.

  • Page 36: Fourth Harmonic Generation

    Precision II Operation and Maintenance Manual a. While still at reduced power, place a power meter after port #2 and align 355 nm into center of detec- tor head. b. Using the RB601, adjust the SHG and then the THG for highest energy. c.

  • Page 37: Lne Alignment

    Chapter II – System Operation port 1 port 2 port 3 Fourth harmonic position. Turn down power of Precision II so that you can safely check the optical alignment of the 1064 nm through the SHG and the 532 nm through the FHG. Also check the alignment of the 266 nm through port #3.
  • Page 38 Precision II Operation and Maintenance Manual Initial alignment Block rear mirror of the oscillator and then adjust the LNE (Line Narrowing Etalon) normal to the optical axis so that the system will lase on the LNE itself. Monitor lasing by using either an IR card, a photodiode or by observing the 532 nm after the Second Harmonic Crystal.

  • Page 39: External Triggering Of Precision Series

    Chapter II – System Operation E. External triggering of Precision II series There are three methods of externally controlling the firing of the Preci- sion II series lasers: Direct Access Triggering (DAT), Stanford Research Pulse Generator and using the laser’s RS232 interface.

  • Page 40: Precision Ii Series Chronograph

    Precision II Operation and Maintenance Manual chronograph Precision II series chronograph. 100 ms @ 10 Hz Period for systems 10 Hz 100 ms 20 Hz 50 ms 30 Hz 33 ms CU 601C “CHARGE” 50 Hz 20 ms command to PU...

  • Page 41: Stanford Research Pulse Generator Setup

    Chapter II – System Operation 5) Begin sending pulses to the EXT flashlamp trig in BNC at the normal repetition rate of the Precision II. These fire flashlamps signals should start the flashlamps. CAUTION: Do not exceed the nominal repetition rate of the laser. Lensing effects from higher repetition rates can damage laser optics.

  • Page 42: External Trigger Panel (Etp)

    Precision II Operation and Maintenance Manual EXT FLASHLAMP Q-SWITCH TRIGGER SYNC OUT photo seeder sync variable fixed delay trig in diode trigger External Trigger Panel (ETP) found on side of bench. DELAYS : 1. A = T + 0 2. B = A + 10 µs 3.

  • Page 43: Remote Rs232 Operation

    Chapter II – System Operation Warning: Laser output should occur at next step. On the Powerlite remote box press on the SHUTTER button. The laser should now lase. If no lasing is observed increase “C” delay until lasing is observed. Adjust the Delay of “C”...
  • Page 44 Precision II Operation and Maintenance Manual 022H PARAMETER DECREMENT 032H PARAMETER SELECT 042H RESET 013H SHUTTER 023H REMOTE/LOCAL 033H CHARGE 043H FIRE 014H Q-SWITCH ON/OFF 024H AUTO/MANUAL 034H START 044H STOP 015H HARMONIC GENERATOR #1 CW 025H HARMONIC GENERATOR #1 CCW 035H HARMONIC GENERATOR #2 CW 045H...

  • Page 45: B) Rs232 Specification/Baud Rate

    Chapter II – System Operation When this command is sent to the CU601 it sends back the “CU601C status” in a 10 byte ASCII string followed by a carriage return. The status byte is returned in the following format: bbbbbbbbbb+CR+ LF = 10 bytes total ||||||||||_____________SHUTTER 0=CLOSED, 1=OPEN...

  • Page 46: D) Host Computer Demo Program

    RGB display card (or equivalent) and a 360 K floppy disk. An RS232 cable, as described in part c, must be installed between the CU601C and the computer. 100 ‘***************************************************************************** 105 ‘* CONTINUUM/SANTA CLARA, CA 110 ‘* SOFTWARE RS232 COMMUNICATION DEMO FROM IBM-PC* 120 ‘* TO CU601 LASER COMPUTER.
  • Page 47 Chapter II – System Operation 1000 CLS 1010 OPEN “COM1:9600,N,8,1” FOR RANDOM AS #1 1020 GOSUB 2000 ‘DISPLAY MENU 1025 GOSUB 3100:GOSUB 3180:GOSUB 3500:GOSUB 3520 ‘GET STA- TUS/CU STATUS 1027 LOCATE 11,1:PRINT” “; 1030 LOCATE 11,1:COLOR(15) 1031 PRINT”ENTER COMMAND”; 1032 COLOR(15+16):PRINT”>” 1041 COLOR 15:LOCATE 11,15:PRINT CMD$;...
  • Page 48 1200 IF CMD$=”Q” THEN STOP 1300 GOSUB 3900 ‘KEEP ALIVE DELAY 1999 GOTO 1030 2000 ‘******* DISPLAY MENU ******** 2005 CLS:COLOR 15,0 2010 PRINT”CONTINUUM - CU601 HOST INTERFACE COMMANDS”+STRING$(26,32); 2015 COLOR 15,0 2020 PRINT STRING$(80,205) 2025 COLOR(7) 2030 PRINT”<C> CHARGE <W>...
  • Page 49 Chapter II – System Operation 3173 LASTPU$ = INPUT$(12,#1) 3174 CUSTAT$ = INPUT$(12,#1) 3176 RETURN 3180 ‘***** DISPLAY PROGRAM STATUS *** 3190 LOCATE 13,1:COLOR(15) 3195 PRINT “PROGRAM STATUS” 3196 PRINT STRING$(30,196) 3197 COLOR(15) 3200 PRINT “REP RATE :”;LEFT$(REPRATE$,10);” Hz” 3210 PRINT “Q-SW DELAY :”;LEFT$(TRIGDELAY$,10)+” uS” 3220 PRINT “PULSE DIV :”;...

  • Page 50: Installation

    Precision II Operation and Maintenance Manual 3570 IF MID$(BUF$,2,1)=”1" THEN PRINT”HGEN 1 CW LIMIT : YES “ ELSE PRINT”HGEN 1 CW LIMIT : NO “ 3575 LOCATE 20+OS,41 3580 IF MID$(BUF$,3,1)=”1" THEN PRINT”HGEN 1 CCW LIMIT: YES “ ELSE PRINT”HGEN 1 CCW LIMIT: NO “ 3585 LOCATE 21+OS,41 3586 IF MID$(BUF$,4,1)=”1"...
  • Page 51 Chapter II – System Operation laser prior to installation by Continuum personnel. Damage occurring due to usage before installation will not be covered under our warranty. Installation requirements Install the laser in a closed and clean location. Lasers work best in a temperature stabilized environment.
  • Page 52 Tel: 1+(408) 727-3240 System installation The installation of the laser will be performed by a Continuum represen- tative at a date agreed upon between the user and Continuum at the time of delivery. The installation will consist of: Hooking up the laser to the water and electricity.
  • Page 53 Chapter II – System Operation 14 unit cabinet (8000) 18 unit cabinet (9000) CU601C PU600C series Precision II physical dimensions. (only on 9000 series) PU600C series CB600C series CB600C series CG604C All dimensions in mm (inches) Precision II series 921.6 (36.31) 9000 1189.2 298.4 ±12 236.06...
  • Page 54 996-0255 rev. b...
  • Page 55 Chapter II – System Operation Chapter III Subassemblies & Module Descriptions Contents A. Laser bench optics ..................3-1 Laser bench electronics ................3-6 C. Laser bench mechanics ................3-14 Electronics cabinet .................. 3-16 E. Control Unit, CU601C ................3-21 F. Power Units, PU600C series ..............3-43 G.
  • Page 56 996-0255 rev. b...

  • Page 57: Physical Dimensions Precision Ii Series

    Chapter III Laser Bench Optics & Electronics Contents A. Laser bench optics ..................3-1 Optical layouts for Precision 9010, 9020 & 9030 ....facing page 3-1 Optical layout for Precision 9050 ............3-1 Laser heads ....................3-2 Exploded head drawings ..............3-3 & 4 B.
  • Page 58 THG or 16 15 residual 355 or 266nm 532nm 1064nm seeder Precision seeder 9020/9030 telescope Legend for Precision 9010, 9020 & 9030 1. Mirror, rear, (rep rate dependent) 11b. Pinhole, 9.5mm, 314-0317 2. Pockels cell, 202-0003 12. Dielectric polarizer, 199-0055 3.

  • Page 59: Chapter Iii Subassemblies & Module Descriptions, Rev. B

    Chapter III –Subassemblies Chapter III Subassemblies & Module Descriptions A. Laser bench optics 1. Optical layouts In this section the optics are shown positioned on the laser bench accom- panied by many of their part numbers for easy reference. For the Preci- sion II 8000 series layouts, please turn to the beginning of Chapter II.
  • Page 60 – red spot Flashlamps The Precision II series heads are pumped by linear flashlamps. These lamps have a voltage polarity that must be observed. The anodes of the flashlamps can be identified by a red marking on the lamp electrode whereas the cathodes have no markings.
  • Page 61 Chapter III –Subassemblies 811D-09 head flashlamp holder Water port connections are under sole plate. Assy, 811U-05,-06,-07 & 09 exploded dwg. flashlamp holder 811U-05,-06,-07 Water port connections & 09 head are under sole plate. 996-0255 rev. b...
  • Page 62 Precision II Operation and Maintenance Manual MAIN BODY O-RING ROD HOLDER MOUNTING PLATE O-RING O-RING END PIECE LAMP HOLDER 2 PLCS O-RING O-RING 4 PLCS 2 PLCS O-RING 2 PLCS O-RING 4 PLCS LAMP HOLDER 2 PLCS END PIECE O-RING O-RING ROD HOLDER O-RING...
  • Page 63 Precision II Part 8000 8010 8020 8030 8050 9010 9020 9030 9050 Plus 811U-05 head assy. 507-1700 cladding only 507-0725 201-0094 osc. flashlamp 203-0019 “O” ring kit 507-1705 811U-06 head assy. 507-0700 cladding only 507-0725 201-0056 osc. osc. & osc. & osc.

  • Page 64: Laser Bench Electronics

    Precision II Operation and Maintenance Manual Q-SWITCH TRIGGER SYNC OUT EXT FLASHLAMP photo seeder sync fixed variable delay trig in diode trigger Precision control panel & External Trigger Panel (ETP) found on side of bench. B. Laser bench electronics 1) Bottom view of laser bench On the bottom of the laser bench are some electrical connections that are not visible when laser is operating.
  • Page 65 Chapter III –Subassemblies 617-8050 HTR PCB 617-9900 635-1360 5.5" 996-0255 rev. b...
  • Page 66 Precision II Operation and Maintenance Manual 617-8050 HTR PCB 617-9900 635-1360 5.5" 8.5" 5" 996-0255 rev. b...

  • Page 67: Seeder Panel On Side Of Bench

    Chapter III –Subassemblies seeder stby freq piezo reset control Seeder panel on side of bench. offset volt bid up time dsbl auto signal is therefore present in INTERNAL and EXTERNAL flashlamp trigger modes. External Q-switch triggering via the Q-SWITCH TRIGGER BNC connector — Positive going TTL pulses trigger the Q-switch without added delay when the INT/EXT switch is in the EXT position, illuminating its red LED.
  • Page 68 Precision II Operation and Maintenance Manual 4) Active Q-switch Principle of Operation The Q-switch consists of the following: Optical a) Pockels cell b) plate polarizing element c) quarter-wave plate. Electrical a) timed pulse generated by control unit CU601C b) Marx board (750 V) c) 750 volt power board.
  • Page 69 Chapter III –Subassemblies 750 volt power board: This board, located under the laser bench, generates the dc voltage neces- sary to power the Marx board. The DC voltage is adjustable by a pot accessible through a hole in the top of the laser bench. Turning the pot clockwise raises the voltage.
  • Page 70 Precision II Operation and Maintenance Manual 750V POWER SUPPLY 504-3200-2 3-12 996-0255 rev. b...
  • Page 71 Chapter III –Subassemblies SYNC PANEL 617-9900-2 996-0255 rev. b 3-13...
  • Page 72 Assy., Marx Bank 504-3100-2 NOTES: (UNLESS OTHERWISE SPECIFIED) 1. ALL RESISTANCE IS IN OHMS, 1/4W, 5%. 2. ALL CAPACITANCE IS IN MICROFARADS. V.CASHION 6/97...

  • Page 73: Wiring Diagrams

    Chapter III –Subassemblies wiring diagram CU601C Crystal Oven1 +24V Externals CU SYNC IN Crystal Oven2 EXT.Q-SW Laser Q-SW Cooling Interlock HP/SHTR Interlock 240V,1A 240V,10A +24 V To control Trig out unit Simmer monitor PU610C output J4 J5 Simmer +24V Monitor SYNC Trig Input...
  • Page 74 Precision II Operation and Maintenance Manual F1 F2 F3 CU601C Crystal Oven1 +24V Externals Cooling\ Crystal Oven2 EXT.Q-SW Interlock Q-SW\ CU SYNC IN Laser\Interlock HP/SHTR 240V,1A 240V,15A +24 V\ Trig out Input Simmer PU620C \monitor output To contr\unit J4 J5 +24V Simmer \Trig...
  • Page 75 Chapter III –Subassemblies Crystal Oven1 CU601C +24V Externals Crystal Oven2 EXT.Q-SW IN Q-SW Laser Cooling CU SYNC IN HP/SHTR Interlock Interlock 240V,1A C30 C17 240V,15A +24 V Trig out Input PU620C Simmer monitor output To contr unit 240V,15A +24 V Trig out Input PU620C...
  • Page 76 Precision II Operation and Maintenance Manual CU601C Crystal Oven1 +24V Externals Crystal Oven2 EXT.Q-SW IN Q-SW Laser Cooling CU SYNC IN HP/SHTR Interlock Interlock 240V,1A 240V,10A +24 V Trig out To contr unit Input Simmer PU610C monitor output 240V,10A +24 V To contr Trig out Input...
  • Page 77 Chapter III –Subassemblies Crystal Oven1 CU601C +24V Externals Crystal Oven2 EXT.Q-SW Laser Cooling Q-SW CU SYNC IN HP/SHTR Interlock Interlock 240V,1A 240V,10A +24 V Trig out To contr Input unit Simmer PU610C monitor output 240V,15A +24 V Trig out Input Simmer monitor PU620C...
  • Page 78 Precision II Operation and Maintenance Manual Crystal Oven1 CU601C +24V Externals Crystal Oven2 EXT.Q-SW Laser Cooling CU SYNC IN HP/SHTR Q-SW Interlock Interlock 240V,1A 240V,10A +24 V To contr Trig out unit Input Simmer PU610C monitor output 240V,20A J7 J8 J5 J6 To Control Unit Simmer Monitor from CB +24V/Trig...
  • Page 79 Chapter III –Subassemblies Crystal Oven1 CU601C +24V Externals EXT.Q-SW Crystal Oven2 Laser Cooling Q-SW CU SYNC IN HP/SHTR Interlock Interlock 240V,1A 240V,15A +24 V Trig out Input Simmer PU620C monitor output To contr unit 240V,20A J7 J8 J5 J6 To Control Unit Simmer Monitor from CB Input +24V/Trig Out from CB...

  • Page 80: Laser Bench Mechanics

    Precision II Operation and Maintenance Manual C. Laser bench mechanics The laser bench mechanics consist of the harmonic positioners (HP70/71). Below is the wiring diagram of an HP70/71 which is used for the second, third and fourth harmonic generators. connector micro spring micro...

  • Page 81: Built-In Rack Electronics Cabinet

    Chapter III –Subassemblies D. Electronics cabinet Continuum’s electronics cabinets have a number of PC boards and electri- cal plugs built into the chassis. Below is a drawing showing the built-in features of the rack. On the next page is a drawing depicting the wiring between the rack mounted modules.
  • Page 82 Precision II Operation and Maintenance Manual Interface box top view Cable adapter interface box (617-8600) mounted inside rack power on crystal ovens RS232 YAG remote sync laser : : : : : : : : : : : : : CU601C J6 laser interlock...
  • Page 83 Chapter III –Subassemblies Chapter III CU601C Control Unit Contents E. Control Unit, CU601C ................3-25 1. General Description ................3-25 CU601C front & rear panels............. 3-26 2. Structural Organization ..............3-27 RB601 keyboard................3-27 PCB references for rear panel connections ........3-28 3.
  • Page 84 Precision II Operation and Maintenance Manual 3-26 996-0255 rev. b...

  • Page 85: Control Unit, Cu601C

    Chapter III – Subassemblies Chapter III Subassemblies & Module Descriptions mini index CU601C operation p. 3-26 RS232 remote control p. 3-31 & 35 E. Control Unit, CU601C 1. General description The CU601C is a microprocessor based system, which provides hardware interfaces and commands to and from the cabinet components and laser bench.
  • Page 86 Precision II Operation and Maintenance Manual • harmonic generator control • shutter control • Q-switch delay • charging and firing control • mode selection • rep rate • pulse division • single shot • storage & retrieval of user programs •...
  • Page 87 RB601 keyboard Power on delay - Lamp will flash approximately once per Continuum second for six seconds and then remain on. Turning front panel key switch from off to on initiates this sequence. A high pitch beep will occur once during the...
  • Page 88 Precision II Operation and Maintenance Manual remote box are restored. A low pitch beep will occur once each cycle during this mode. The CU601C will also default to LOCAL/MANUAL Mode. Keyswitch The keyswitch, when in the off position, performs a “cold reset”, halts the main microprocessor board and disables the four power unit interfaces on the rear panel.
  • Page 89 Chapter III – Subassemblies 3. CU601C rear panel interfaces g) F1,F2 F1 and F2 are hi-side and return line fuse holders. The fuses are 1A 250 V Bus Type GDC or equivalent. h) J1 220 Vac J1 is the ac line input which provides 220Vac power to the internal linear open frame power supplies.
  • Page 90 Precision II Operation and Maintenance Manual cooling group water flow, water temperature and water level. p) CU sync in This BNC connector receives the delayed trigger from the oscillator capacitor bank. The CU601C tracks this signal so that changing the delay on the front of the capacitor bank does not change the Q-switch delay.
  • Page 91 Chapter III – Subassemblies HARMONIC GENERATOR #2 CW HARMONIC GENERATOR #2 CCW REMOTE/LOCAL b) AUTO/MANUAL This key toggles the CU601C between the auto and the manual mode. Initially, the CU601C is in the manual mode and the following is displayed: When this key is pressed, the CU601C is placed into the auto mode.
  • Page 92 Precision II Operation and Maintenance Manual [x] represents the power unit(s) that have failed to charge. If more than one power unit has failed to charge, the display will sucessively show on the 1st line the power units that have failed. EOC FAILURE PU [x] d) FIRE In the manual mode, pressing this key causes a fire com-...
  • Page 93 Chapter III – Subassemblies pulse division F/3 means that the Q-switch will operate every third flash lamp flash. The net result is that the laser is firing at the repetition rate of the flash lamp. If the pulse division is decremented below F/1, SINGLE SHOT will be displayed on the 1st line and Q-switching action will be inhibited.
  • Page 94 Precision II Operation and Maintenance Manual The shutter will be closed and the Q-switch will be turned off when this key is pressed. PROGRAM UP/PROGRAM DOWN When in auto mode, these keys select 1 of 16 user pro- grams stored in memory by incrementing or decrementing the program number.
  • Page 95 Chapter III – Subassemblies p) REMOTE/LOCAL This key is used to place the CU601C into the remote mode or local mode of operation. Local mode so far has been discussed. Remote mode places the CU601C into a mode in which the CU601C may be controlled through the front panel RS232 connector.
  • Page 96 If you see any of these traps being reported to the remote box, try reset- ting the CU601C by turning the front panel keyswitch OFF then ON. Usually this corrects the problem. If it does not, contact Continuum for service.
  • Page 97 REP RATE MIN 1Hz REP RATE MAX 15Hz The rep rate max. and rep rate min. values will have to be reset. Call Continuum for help. The RS232 baud rate will default to: BAUD RATE 9600 The host RS232 baud rate may have to be set to a new value if the host computer program is different from the default baud rate.
  • Page 98 2X 503-8905 FRONT PANEL REAR PANEL SYNC SPEAKER FAN (24VDC) J1 1 PCBA SYNC DELAY PCBA 504-1400 MICROPROCESSOR 503-9900 CRYSTAL HEATER CRYSTAL CRYSTAL PCBA 220/48VAC OVEN 2 OVEN 1 LAMP 601-7200 421-0136 LITHIUM BATTERY (3.0V) SWITCH 7 W114 W113 J4 P4 W112 POWER W111...
  • Page 99 Chapter III – Subassemblies 996-0255 rev. b 3-39...
  • Page 100 Precision II Operation and Maintenance Manual 3-40 996-0255 rev. b...
  • Page 101 Chapter III – Subassemblies 996-0255 rev. b 3-41...
  • Page 102 Precision II Operation and Maintenance Manual 3-42 996-0255 rev. b...
  • Page 103 Chapter III – Subassemblies 996-0255 rev. b 3-43...
  • Page 104 LM340T-5.0 220 OHM 504-1400-2 2.2K 22/35 rev. C 0.22 VP1008 DELAY 2.2K 2.2K 2.49K 1% 2N2907 CEXT CEXT 100PF 0.001 2.2K REXT/CEXT REXT/CEXT 2N2222 470 OHM 100 OHM VARIABLE Q 13 QSYNC2 SYNC Q 12 3 PIN MOLEX 1K 1/2W 74LS221 74LS221 22/35...
  • Page 105 Chapter III – Subassemblies Chapter III PU600C Series Contents PU600C series power units ..............3-45 1. General Description ................3-45 2. Structural Organization ............... 3-45 PU610C/630C front & rear panels............. 3-46 3. Principle of Operation ................ 3-47 4. Connections and Signals ..............3-48 Schematics &...
  • Page 106 Precision II Operation and Maintenance Manual 3-46 996-0255 rev. b...
  • Page 107 F. Power units, PU600C series 1. General description The PU600C series power units are Continuum's state of the art MOSFET switching power supplies. These power units provide a current source to charge the capacitor bank for all our high rep rate systems up to 60 Hz.
  • Page 108 Precision II Operation and Maintenance Manual pulse on the +24 volt accessory output is for system rep rate syn- voltage (kV) chronization. The function of the 24Vdc supply is to: power on AC power HV enable • power accessories PU620C •...

  • Page 109: Reactance-Limiting Inductor L

    Chapter III – Subassemblies 3. Principle of Operation The power units use an off-line reactance-limited dc-dc converter to provide a controlled charging current to the capacitor bank. The capacitor(s) in the CB present a low impedance voltage source to the HV diode bridge whatever the charge voltage.
  • Page 110 Precision II Operation and Maintenance Manual (when the ac line voltage is high), the frequency of the inverter increases. This has the effect of lowering the current in L and thus the output current of the power unit. An undervoltage cutoff is also provided in the VCO PCBA to avoid laser operation in brown-out conditions.
  • Page 111 Chapter III – Subassemblies I pk (L) E (input) Reduced I pk (L) as E (output) rises. A number of protective circuits are provided to assure correct operation of the power unit. There is the optically isolated “power unit enable” input which turns on the +24V internal power supply and enables the power units to operate.
  • Page 112 Precision II Operation and Maintenance Manual Logic PU Power 1 PU Power 2 PU620C Chassis 996-0255 rev. b 3-50...
  • Page 113 Chapter III – Subassemblies PU610C/620C BLOCK DIAGRAM 512E-6200 996-0255 rev. b 3-51...
  • Page 114 Precision II Operation and Maintenance Manual 996-0255 rev. b 3-52...
  • Page 115 Chapter III – Subassemblies 996-0255 rev. b 3-53...
  • Page 116 Precision II Operation and Maintenance Manual 996-0255 rev. b 3-54...
  • Page 117 Chapter III – Subassemblies 996-0255 rev. b 3-55...
  • Page 118 Precision II Operation and Maintenance Manual 996-0255 rev. b 3-56...
  • Page 119 Chapter III – Subassemblies 996-0255 rev. b 3-57...
  • Page 120 Precision II Operation and Maintenance Manual 996-0255 rev. b 3-58...
  • Page 121 Chapter III – Subassemblies 996-0255 rev. b 3-59...
  • Page 122 Precision II Operation and Maintenance Manual 996-0255 rev. b 3-60...
  • Page 123 Chapter III – Subassemblies VCO/HV SENSE 504-4500 996-0255 rev. b 3-61...
  • Page 124 Precision II Operation and Maintenance Manual 996-0255 rev. b 3-62...
  • Page 125 Chapter III – Subassemblies (TO CAPACITOR BANK) (TO REAR PANEL) (POWER COMMON) (+300 POWER) 996-0255 rev. b 3-63...
  • Page 126 Precision II Operation and Maintenance Manual 996-0255 rev. b 3-64...
  • Page 127 Chapter III CB600C Series Contents G. CB600C series simmer capacitor banks ............ 3-65 1. General description ................3-65 2. Structural organization ................3-65 CB630C front & rear panels............... 3-66 3. Principle of operation ................3-67 4. Connections and signals ............... 3-68 5.
  • Page 128 996-0255 rev. b...
  • Page 129 2. Structural Organization When you open a Continuum capacitor bank, the main capacitor is mounted in the middle of the chassis (see page 3-70). The trigger board is standing on its side in the left of the chassis next to a large transformer. In the right rear corner of the chassis are the power relay, rf line filter and fuses.

  • Page 130: Cb634C Front & Rear Panels

    Precision II Operation and Maintenance Manual Front Panel The front panel of the capacitor bank has two red indicator lights marked POWER ON and SIMMER. There is also a DELAY ADJ dial. Rear Panel The HIGH VOLTAGE input J3, must be connected to the power unit through the high voltage output.
  • Page 131 Chapter III – Subassemblies 3. Principle of Operation The capacitor banks have a current source power supply for simmer operation. The current source power supply consists of logic to monitor simmer operation, a conventional switching power supply to produce the current for simmer operation (see pages 3-74 & 75) and an under voltage detector for the +24V and the unregulated -600V.
  • Page 132 Precision II Operation and Maintenance Manual Trigger Circuit The trigger PCBA (see schematics p. 3-76 & 77) contains logic circuitry to monitor for simmer or non-simmer ( U5 & U6). Output signals indicate "POWER ON" and simmer/non-simmer operation, (J4). The front panel "Delay Adj"...
  • Page 133 1.83 kV while the CB631C delivers 50 joules at 1.83 kV and the CB632C 84 joules at 1.83 kV. All Continuum's capacitor banks have a 24V trigger input which carries the synchronization signal from the power unit. All models of the CB600C series have a pulse delay time that is adjustable from 50 to 550 µs by the potentiometer which is on the front of the power unit.
  • Page 134 Precision II Operation and Maintenance Manual TRIGGER PCB P57 P10 P5 P9 CURRENT SOURCE PCB H. V. INPUT PCB SCR PCB CB634C 512-6340 3-70 996-0255 rev. b...
  • Page 135 Chapter III – Subassemblies CB630C BLOCK DIAGRAM 512-6300 rev. c, sht. 7 of 7 996-0255 rev. b 3-71...
  • Page 136 Precision II Operation and Maintenance Manual 3-72 996-0255 rev. b...
  • Page 137 +SCR 2.2 OHM 1/2W 2.2K SOLDER 2 PIN MOLEX -SCR 1N4003 PE61018 WHITE 2.2 OHM 1/2W SOLDERPAD (HV INPUT) BRACKET 100 OHM 1/2W CC (HV OUTPUT) C502L 27 OHM 2W CC 27 OHM 2W CC 27 OHM 2W CC 27 OHM 2W CC .25/3KV Q1,SCR MOUNTING BRACKET.
  • Page 138 Precision II Operation and Maintenance Manual CURRENT SOURCE PCB 504A-6400-2 3-74 996-0255 rev. b...
  • Page 139 Chapter III – Subassemblies CURRENT SOURCE PCB 504B6400 996-0255 rev. b 3-75...
  • Page 140 Precision II Operation and Maintenance Manual TRIGGER PCB 504A-6710 3-76 996-0255 rev. b...
  • Page 141 Chapter III – Subassemblies TRIGGER PCB 504B6710 996-0255 rev. b 3-77...
  • Page 142 Precision II Operation and Maintenance Manual HV input HV BNC connector 10K/3W 10K/3W 10K/3W 10K/3W 10K/3W on rear panel solders to E1 Reference (center connection) 10K/3W 10K/3W 10K/3W 10K/3W 10K/3W 1N5406 1N5406 1N5406 1N5406 1N5406 HV Output MRB10 +24 V/trigger HV Safety Common Relay...
  • Page 143 Chapter III – Subassemblies Wiring diagram CB634C 512-6340. 996-0255 rev. b 3-79...
  • Page 144 Precision II Operation and Maintenance Manual TRIGGER PCB P57 P10 CURRENT SOURCE PCB H.V. INPUT PCB SCR PCB CB631C Chassis 512-6310 3-80 996-0255 rev. b...
  • Page 145 CURRENT SENSE CHASSIS 2 PIN MUR110 MUR110 MOLEX C1 660 0.5 OHM 5W WW /400 R1 33K 4 PIN AMP MALE SIMMER 0.1/1500 220K OUTPUT C R 5 220K 1/2W 220K 1/2W FLOATING 1/2W D S E I 1 2 - MR760 500VAC 1 0 A...
  • Page 146 Precision II Operation and Maintenance Manual 3-82 996-0255 rev. b...
  • Page 147 Chapter III CG604C Cooling Group Contents H. Cooling Group, CG604C ................3-83 1. General description ................3-83 2. Structural organization ................3-83 CG604C front & rear panels............... 3-83 3. Principle of operation ................3-84 4. Connections ..................3-84 5. Filling and startup ................. 3-85 6.
  • Page 148 996-0255 rev. b...

  • Page 149: Cooling Group, Cg604C

    Chapter III – Subassemblies Chapter III Subassemblies & Module Descriptions H. Cooling Group, CG604C mini index Cooling requirements graph, 10 & 30 Hz p. 3-86 CG604C wiring dia. p. 3-87 Waterflow diagram p. 3-89 1. General Description The CG604C cooling group is a rack mounted unit that is located in the bottom of the cabinet.
  • Page 150 Precision II Operation and Maintenance Manual The small opening in the top of the reservoir just behind the DI cartridge is for filling the reservoir with DI water. Refer to the front panel drawing and the "Resistivity" light. This is set at 500 KΩ.cm.
  • Page 151 The cooling unit has a built-in DI filter. The filter should be replaced every 6 months or when indicated by front panel resistivity light. Order replacement filters from Continuum part no. 313- 0099. The cooling group should be checked once a year for loose connec- tions, loose screws and fasteners.

  • Page 152: Cooling Requirements 50Hz

    Precision II Operation and Maintenance Manual 3 kW 2 kW 1 kW Tap water temp. (deg. C) CG604C (10 & 30 Hz only) cooling requirements. 996-0255 rev. b 3-86...
  • Page 153 +24 VOLT W33 W32 TEMPERATURE SET 500 OHM POT 10 TURN J3 P3 RESISTIVITY REAR PANEL AUX PUMP -RESISTIVITY LED MAIN PUMP +12V HEATER TO MOTORS -PWR ON LED AC LINE AND HEATER AC LINE +12V AC LINE LVLSWITCH+ THERMOSTAT LVLSWITCH- FLOWSWITCH+ FLOWSWITCH-...
  • Page 154 Precision II Operation and Maintenance Manual 996-0255 rev. b 3-88...
  • Page 155 Chapter III – Subassemblies 996-0255 rev. b 3-89...
  • Page 156 Precision II Operation and Maintenance Manual 3.14 kW Tap water temp. (deg. C) 9050 Cooling Requirements (35° C Regulating Temperature) 996-0255 rev. b 3-90...
  • Page 157 Chapter III – Subassemblies Chapter IV Maintenance Contents A. Cleaning optics .................... 4-1 B. Flashlamp removal & replacement ............... 4-2 C. Rod replacement ..................4-4 D. Replacing DI water filter ................4-7 Bacterial growth ..................4-8 E. "O"ring replacement ..................4-9 996-0255 rev.

  • Page 158: System Maintenance Schedule

    System maintenance schedule. Each month Every 6 months Every 12 months Check systen alignment see troubleshooting Clean/inspect optics see page 4-1 Check for bacteria & perform cleaning procedure of DI water see page 4-8 Change DI filter in cooling unit see page 4-7 Replace flashlamps see page 4-2 Inspect cooling water...

  • Page 159: Chapter Iv Maintenance, Rev. B

    Chapter IV – Maintenance Chapter IV Maintenance The Precision II series requires minimal maintenance, however, there are some things that should be checked on a weekly basis. Examine the optics biweekly and clean as inspection warrants. Initial cleaning can be done with pulsed air. Then, if streaks or dust persist, the optics should be carefully cleaned with soft optical tissue and either reagent grade methanol or isopropyl alcohol.

  • Page 160: Flashlamp Removal & Replacement

    Precision II Operation and Maintenance Manual Swab optic gently with the applicator starting at center and working towards the edge. Repeat step 1, using a dry swab to remove residue. B. Flashlamp removal & replacement Precision II series heads Head Laser Head Flashlamp Flashlamp P/N Qty.
  • Page 161 Chapter IV – Maintenance CAUTION Base cradle screw threads are aluminum and can be stripped if over tightened. A snug fit is adequate. Release the laser head from its base cradle plate by screw- ing clockwise (viewed from above) the thumbwheel located below the laser head.

  • Page 162: Rod Replacement

    Precision II Operation and Maintenance Manual 15) Place laser head near base cradle and reattach lamp connectors at each end. Make sure lamp electrodes are dry before sliding lamp connectors over lamp ends. 16) Place the laser head in base cradle and begin to screw the thumb wheel counter clock wise to reattach the laser head to its cradle.
  • Page 163 Chapter IV – Maintenance Turn off laser. Main breaker located on the front right hand side of electronics cabinet should be in the off position. high side side view YAG rod HeNe view V block CAUTION Turn off the night-time water pump by flipping the switch on the rear panel of the power supply.
  • Page 164 Precision II Operation and Maintenance Manual 12) Mark the endplates of the laser head so that the anode and cathode endplates are not mixed. 13) Using a 2.5 mm Allen wrench remove the four screws at each end holding the endplates. 14) Grasp firmly the central body housing in one hand and the endplate in the other and slowly slide the endplate directly away from the central body.

  • Page 165: Replacing The Di Water Filter

    Chapter IV – Maintenance 22) Check the anode cathode orientation of lamp and insert the lamp into head according to“+” and “-” stickers on side of head. The cathode (-) has a hemispherical shape and the anode (+) has a flat surface and the red dot. 23) Install the Teflon backing ring and then the black "O"ring over the ends of the lamp electrodes.
  • Page 166 Precision II Operation and Maintenance Manual inches. The large fill plug on top of the reservoir should be exposed. Drain the CG604C reservoir by using the quick connect suppled with the system. Plug the quick connect into the FILL located on the front panel and drain the old water into a drain pan.

  • Page 167: Bacterial Growth

    Equipment needed: • Hydrogen peroxide, 3%, 750-1000 mL (can be pur- chased at a local drug store) • DI filter, Continuum P/N 313-0099 (optional) • Funnel Note: The laser system can be running during this procedure.
  • Page 168 Precision II Operation and Maintenance Manual Study exploded head drawing. Turn off main breaker located on the front right hand side of electronics cabinet. CAUTION Turn off the night-time water pump by flipping the switch on the rear panel of the power supply. Disconnect head plug cables at rear of laser bench (large green military style connectors).
  • Page 169 Chapter IV – Maintenance 14) Don gloves or finger cots and carefully using your fingers slide a new rod “O”ring over the end of the rod. 15) Use Methanol,lens paper and cotton swabs and clean rod end. 16) Replace the endplate on the laser head, tightening the screws in an X pattern to compress “O”ring evenly.
  • Page 170 Precision II Operation and Maintenance Manual 26) Flow test the laser head. If leaks occur, repeat the neces- sary procedures. 27) Log the date and the shot count from the control unit and the procedure is complete. 996-0255 rev. b 4-12...
  • Page 171 Chapter IV – Maintenance Chapter V Troubleshooting Contents Troubleshooting flow charts ..............5-1 to 4 Chronograph .................... 5-5 A. Electronics rack troubleshooting ..............5-6 B. Q-switch troubleshooting ................5-8 Burn pattern diagram ................5-9 C. Going to free-running ................5-10 D.
  • Page 172 996-0255 rev. a 9/00 996-0255 rev. b...
  • Page 173 Chapter V – Troubleshooting Troubleshooting guide for Precision series No lasing output Go to free run & Perform electronic cabinet Lamps measure IR energy troubleshooting procedure flash? see page 5-10 see page 5-6 Perform Q-switch 1) Check for optical damage electronics test IR power 2) Adjust rear mirror...
  • Page 174 Precision II Operation and Maintenance Manual Electronics rack troubleshooting flow chart. On systems with >1 laser head look to see if either head flashes Assume CU601 & PU OK. Check With system in Manual mode, Either flashlamps in laser head & press CHARGE key on RB601.

  • Page 175: Optical Troubleshooting Chart

    Chapter V – Troubleshooting Optical troubleshooting chart. Problem Proposed Action Reference check for damaged optics make list of damaged optics & contact Continuum check crystal angle & optimize Low Harmonics Energy page 5-20 check 1.06µm energy page 5-12 check low energy osc.
  • Page 176 5-24 check cooling group for slime & clean perform electronic troubleshoot check for "power on" & allow for contact Continuum warmup No seeder output check that seeder shutters are open 996-0255 rev. b...
  • Page 177 Chapter V – Troubleshooting chronograpg Precision II series chronograph. 100 ms @ 10 Hz Period for systems 10 Hz 100 ms 20 Hz 50 ms 30 Hz 33 ms CU 601C “CHARGE” 50 Hz 20 ms command to PU Charging time varies with line voltage and “End of Charge”...

  • Page 178: Chapter V Troubleshooting, Rev. B

    Precision II Operation and Maintenance Manual Chapter V Troubleshooting A. Electronics rack troubleshooting This procedure is designed to allow the user to troubleshoot down to the module level (CU, PU, CB). It does not allow for troubleshooting down to the individual component level (IC, transistor, etc.) within a rack module.
  • Page 179 Chapter V – Troubleshooting • on rear of CU601C are 4 CU to PU “D” type connec- tors. At an open CU to PU connector measure with a VOM the dc voltage on pin #5. It should be 15V if the RB601 indicates no security faults.

  • Page 180: Q-Switch Troubleshooting

    Precision II Operation and Maintenance Manual time you press the RB601 FIRE button. If no signal is present, repair CU601C. Look for PU FIRE signal - On rear of PU use BNC “T” to measure the signal going from PU J5 to CB J5. The signal should go from 24 to 0Vdc each time the RB601 FIRE button is pressed.

  • Page 181: Burn Pattern Diagram

    Chapter V – Troubleshooting Burn pattern diagram. Beam off to right. Moving towards center. Almost on center. High and right. Over correction Good alignment. now low & right. Still low but horizontal Good alignment. is good. All of the burn patterns shown above are simulated "back burns". Orientation: Taken between mirror mounts 2 and 3 as though the beam is coming out of the page.

  • Page 182: Going To Free-Running

    Precision II Operation and Maintenance Manual NOT make direct electrical contact. The 4 kV signal is inductively coupled onto the scope probe so close proxim- ity is all that is required. On the RB601 select PGM-3 mode and press ACTIVATE and Q-SWITCH ON/OFF.
  • Page 183 Chapter V – Troubleshooting Equipment needed: • 1 oscilloscope (1MΩ input) • 1 photodiode risetime ~1ns • 1 Styrofoam high density beam block • 1 metric Allen wrench set • 1 English Allen wrench set Turn system off. λ Locate plate #1 (closest to Pockels cell) and using a pencil, mark the holder ring at the 12:00 position.

  • Page 184: Oscillator Alignment Optimization

    Precision II Operation and Maintenance Manual D. Oscillator alignment optimization This section will describe specific procedures for aligning and optimizing oscillator performance. Equipment needed: • Kodak Linagraph paper (type 1895, CAT#1986108) • clear plastic bags • 1 metric Allen wrench set •...

  • Page 185: Image As Seen Through Rod

    Contact Continuum Service Department for information. 11) Check down stream alignment of optics, amplifiers and crystals to insure that they are still correctly aligned.

  • Page 186: Oscillator Optimization (With An Oscilloscope)

    Precision II Operation and Maintenance Manual E. Oscillator optimization (with an oscilloscope) For the Precision series lasers that employ the “Gaussian” oscillator, optimizing cavity alignment using an oscilloscope can be very useful. If the oscillator is well aligned the output pulse width is at its narrowest ( 5-8 ns).

  • Page 187: Measuring Oscillator Stability In The Free-Running Mode

    Chapter V – Troubleshooting Place the photodiode on the laser bench so that it will be able pick up the laser light scattered off the beam block. Be sure that the voltage setting on the power unit is set to the laser’s normal operating voltage.
  • Page 188 Precision II Operation and Maintenance Manual Use the procedure on how to go to free-running to set up the oscillator in the free running mode. Check that the oscillator pump voltage is at its normal operating level. 3) Verify that the beam block is still in place between 7c and 7d and that the intracavity shutter is closed (see 5-21).

  • Page 189: Eliminating Free-Running

    Chapter V – Troubleshooting 10) A plus or minus shot-to-shot stability of between 1% and 2.5% is normal. If stability is poor, refer to troubleshoot- ing guide. G. Eliminating free-running Free-running is a term used to describe the phenomenon of a Q-switched oscillator actually lasing before the Q-switch is open.
  • Page 190 Precision II Operation and Maintenance Manual “active” free-running. Active free-running is generally caused by ther- mal blooming effects in the Pockels cell. Warning! Operating the Q-switch while the laser is free-running can cause severe damage. During normal laser operation free-running will manifest itself in the form of erratic shot-to-shot stability or even a snapping sound coming from the laser.
  • Page 191 15) Continue these adjustments until the free-running has been eliminated. further adjustment required flashlamp rise 16) Close the intracavity shutter and increase the pump voltage by 100 volts. CAUTION: Do not exceed 1.7kV unless otherwise instructed to do so by a Continuum representative. 996-0255 rev. b 5-19...

  • Page 192: Dual Inline Amplifier Alignment Single Rod Head 811-09

    Precision II Operation and Maintenance Manual 17) Open the intracavity shutter and look at the oscilloscope to see if the laser is free-running. 18) If the laser is in a free-running state, then repeat steps 11 through 15 while at this higher pump voltage. Once the oscillator optics are properly adjusted, passive free-running should not occur until the pump voltage has exceeded 100 volts above the normal operating level.
  • Page 193 Chapter V – Troubleshooting locking screws locking vertical screws adjustment vertical adjustment locking screws horizontal adjustment Precision II amplifier adjustment screws. The alignment of the Precision II 9000 series is the same for all repetition rates. This procedure assumes that the operator already knows how to align an oscillator.

  • Page 194: Dual Amplifier Ir Alignment

    Precision II Operation and Maintenance Manual 7) Replace the second amplifier head. 8) With the horizontal adjustment screws, align the rod so that it is centered on the HeNe beam. To translate the head use both screws. For angular adjustment use screw #2.

  • Page 195: Amplifier Alignment Burn Patterns

    Chapter V – Troubleshooting low and to the right vertical align. is good, but is still overcorrected to right to the right alignment correct & centred Amplifier alignment burn patterns. 4) Slide mirror 7d until beam is parallel to the side of the bench and centered on the pinhole.

  • Page 196: Quartz Rotator Alignment Procedure

    Precision II Operation and Maintenance Manual J. Quartz rotator alignment procedure for Precision II 9000 The quartz rotator, P/N 199-0067, converts horizontal polarization to vertical and vertical polarization to horizontal. With the rotator between the two amplifier rods, the depolarization due to birefringence in the first rod is undone by the second rod.
  • Page 197 Chapter V – Troubleshooting Now, power the system back up and activate PGM- 1 to allow the system to warm up. Only the oscilla- tor should be flashing at this time. On the RB601 activate PGM-2, turn on SHUTTER and Q- SWITCH and then press FIRE to take single shot oscilla- tor burns.

  • Page 198: Beam Block Position

    Precision II Operation and Maintenance Manual beam block position seeder 11) Once the aperture alignment is correct, then the alignment through the amplifier can be checked. 12) Position the burn paper (inside a plastic bag) approxi- mately 4 inches from the output of the amplifier head. 13) On RB601 turn on SHUTTER and Q-SWITCH and then press FIRE to get a single shot burn pattern.

  • Page 199: Flashlamp Voltage Adjustment

    Chapter V – Troubleshooting 19) Reconnect power to amplifier capacitor bank: Turn off rack main breaker located on front right hand corner. At rear of rack replace cover plates. Reconnect at rear of capacitor bank the high voltage BNC that runs from power unit to capacitor bank. 20) Amplifier alignment is now complete.

  • Page 200: Cooling Group Contamination

    Precision II Operation and Maintenance Manual If the energy is back to its spec level, then note the voltage setting in users log and resume normal operation. M. Cooling group contamination Equipment needed: • 1 pint (~.5l) 3.0% hydrogen peroxide •...
  • Page 201 Chapter V – Troubleshooting Chapter VI Parts Lists Contents Precision II 8000, 8010, 8020, & 8030layouts with part numbers ..6-1&2 Precision II 9010, 9020, 9030 & 9050 layouts with part numbers ..6-3 &4 Precision II Laser heads .................. 6-5 Electronics parts ....................
  • Page 202 Precision II Operation and Maintenance Manual 5-30 996-0255 rev. b...

  • Page 203: Chapter Vi Parts Lists, Rev. B

    Chapter VI – Parts Lists Chapter VI Parts Lists seeder telescope 8000 seeder 1064 355 or 266 residual 532 & 1064 THG or Legend for Precision 8000 1. Mirro r, rear, (rep rate 6. Output coupler, (rep rate 12. 812V-09 head, 507-0900 dependent) dependent) rod, 9mm, 201-0005...
  • Page 204 Precision II Operation and Maintenance Manual seeder telescope 8020 seeder 1064 355 or 266 residual 532 & 1064 THG or Legend for Precision 8020 1. Mirror, rear, (rep rate 6. Output coupler, (rep rate 12. 812V-09 head, 507-0900 dependent) dependent) rod, 9mm, 201-0005 2.
  • Page 205 Chapter VI – Parts Lists THG or 16 15 residual 355 or 266nm 532nm 1064nm seeder Precision seeder 9020/9030 telescope Legend for Precision 9010, 9020 & 9030 1. Mirror, rear, (rep rate dependent) 11b. Pinhole, 9.5mm, 314-0317 2. Pockels cell, 202-0003 12.
  • Page 206 Precision II Operation and Maintenance Manual THG or 16 15 residual 532 & 1064nm 355 or 266 532nm 1064nm seeder Precision 9050 seeder telescope Legend for Precision 9050 1. Mirror, rear, (rep rate dependent) 12. Dielectric polarizer, 199-0055 2. Pockels cell, 202-0003 13.
  • Page 207 Precision II Part 8000 8010 8020 8030 8050 9010 9020 9030 9050 Plus 811U-05 head assy. 507-1700 cladding only 507-0725 201-0094 osc. flashlamp 203-0019 “O” ring kit 507-1705 811U-06 head assy. 507-0700 cladding only 507-0725 201-0056 osc. osc. & osc. & osc.

  • Page 208: Electronics & Supplies

    Precision II Operation and Maintenance Manual Electronics & Supplies Part Number Description Quantity 504-3100 Marx PCB, 750V 504-3200 Power board, 750V 601-7200 PCB crystal oven 504-4400 Logic PCB, PU610C series 425-0013 24V power supply 421-0008 CB630C & CB631C trig. trans. 421-0042 CB632C &...
  • Page 209 Chapter VI – Parts Lists Chapter VII Appendix Contents A. Express warranty ..................7-1 B. Limitation of remedy ..................7-1 C. Disclaimer of implied warranty ..............7-1 D. Returns, adjustments & servicing ..............7-1 E. Service information ..................7-3 Domestic ....................7-3 Foreign .......................
  • Page 210 996-0255 rev. b...

  • Page 211: Chapter Vii Appendix, Rev. B

    D. Returns, adjustments & servicing If warranty or general repair or service to a Continuum product is re- quested by the customer involving the product’s return to Continuum, the terms of the return shall include the following:...
  • Page 212 The customer shall obtain a return authorization number from the Continuum Service Department The product must be properly packed in the original Continuum shipping container. Additional shipping containers may be purchased from Continuum if needed. All water must be re-...

  • Page 213: Service Information

    Chapter VII – Appendix E. Service information Continuum service centers Continuum 1 (408) 727-3240 3150 Central Expressway 1 (408) 727-3550 fax Santa Clara, CA 95051, USA Continuum@ceoi.com www.continuumlasers..com Continuum GmbH 089 800 64 10 Bochstrasse 12 49 89 800 1279 fax D-82178 Puchheim, Germany cntgmbh@ccn.de...
  • Page 214 Precision II Operation and Maintenance Manual 996-0255 rev. b...

  • Page 215: Lightwave™ Seeder Manual

    Chapter VII – Appendix F. Lightwave® Seeder Manual Series 101 User’s Manual Published by Lightwave® Electronics, Rev. X1, 28 June 2000 996-0255 rev. b...
  • Page 217 SERIES 101 USER’S MANUAL D-0883 REV. X1 6/28/00...
  • Page 218 REFACE Thank you for purchasing this Lightwave Electronics’ product. We are confident this product will serve you well. Any comments you have concerning our product or your application are encouraged. Please feel free to call, Fax or E-mail us at: Sales: 1.888.LIGHTWAVE (544-4892) Service: 1.888.LWESERV...
  • Page 219 ARRANTY Lightwave Electronics Corporation ("Lightwave") warrants products of its manufacture against defective materials and workmanship for a period of one (1) year from the date of installation by the purchaser or, if shorter, for a period of thirteen (13) months from the date of shipment to the purchaser.
  • Page 220 TABLE OF CONTENTS .............................i REFACE ................i RIEF VERVIEW OF IGHTWAVE LECTRONICS .............................i ATENTS ............................ii ARRANTY ........................ii IMITATION OF IABILITY SECTION 1: OVERVIEW....................... 1 1.1 INJECTION SEEDING THEORY ...................1 1.1.1 Longitudinal Modes of a Standing Wave Resonator ............1 1.1.2 Q-switch Buildup Time: Unseeded Operation ..............3 1.1.3 Q-switch Buildup Time: Seeded Operation.................3 1.1.4 Frequency Control of the Host Laser..................4 1.1.5 Suppression of Spatial Hole Burning ..................
  • Page 221 2.2.1 Mounting ........................... 23 2.2.2 Gross Mirror Alignment....................24 2.2.3 Q-switch Voltage Optimization ..................24 2.2.4 Frequency Overlap Adjustment..................25 2.2.5 Fine Mirror Alignment ...................... 27 SECTION 3: OPERATION ......................28 3.1 CONTROL PANEL ........................ 28 3.1.1 Key Switch ......................... 28 3.1.2 Emission Indicator ......................
  • Page 222 TABLE OF FIGURES Figure 1-1: Optical Components of a Typical Host Resonator ............1 Figure 1-2: Longitudinal Modes of the Host Laser ................2 Figure 1-3: Q-switch Build-up Time Reduction .................4 Figure 1-4: Host Laser Buildup Time vs. Seed Laser Frequency............5 Figure 1-5: Frequency Control Loop-Block Diagram .................

  • Page 223: Section 1: Overview

    SECTION 1: OVERVIEW The Series 101 injection seeding system provides single longitudinal (axial) mode CW output which results in single longitudinal mode pulsed output when mated with a Nd:YAG host laser. As an added benefit, by running in a single longitudinal mode the temporal profile of the pulsed output will be smoothed, and the energy stability will be significantly improved.
  • Page 224 The high reflecting mirror and output coupling mirror of the host laser form a Fabry-Perot resonator. The Fabry-Perot cavity supports specific resonant frequencies due to the constructive and destructive interference of counter-propagating waves within the resonator. The term longitudinal mode describes a condition where, at any given point along the resonator axis, a wave propagating between the two cavity mirrors will have exactly the same phase after a full round trip.

  • Page 225: Q-Switch Buildup Time: Unseeded Operation

    1.1.2 Q-switch Buildup Time: Unseeded Operation The Q-switch is included in the host resonator to initially inhibit lasing as the stored energy in the laser rod increases due to flashlamp emission. This ensures that the Nd:YAG rod in the host resonator has stored as much energy as possible.

  • Page 226: Frequency Control Of The Host Laser

    1.1.4 Frequency Control of the Host Laser In the previous section reference was made to injecting seed radiation with the proper frequency characteristics into the host cavity. Since the seed and host cavities are independent entities, some form of frequency control and stabilization are required. The standard approach is to accurately stabilize the frequency output of the seed laser.
  • Page 227 Figure 1-4 shows the Q-switch build-up time as the seed laser frequency is scanned through the host gain curve. The expanded view shows that, as the piezo is translated in either direction from the exact optimum frequency overlap condition, the effect on the Q-switch build-up time is the same.

  • Page 228: Suppression Of Spatial Hole Burning

    The derivative, ðT /ðL, is developed by slightly changing or "dithering" the cavity length (and thus the laser output frequency), and measuring the change in the build-up time. The dither is produced by translating the piezo a small amount from its average position in an alternating fashion. On the first pulse the resonator is dithered to a slightly shorter length from its average length, and then dithered to a slightly longer length by the same amount on the subsequent pulse.

  • Page 229: Frequency Control Of The Injection Seeder

    At the nodal points of the standing wave within the gain media the electric field vector is zero and hence no stimulated emission can occur. Since significant energy storage and gain can remain at these nodal points, light of such frequency as to have a non-zero field at the other frequency’s nodal points can exceed threshold for lasing.

  • Page 230: Frequency Overlap Of Seeder And Host Laser

    1.1.7 Frequency Overlap of Seeder and Host Laser For proper seeding it is necessary that the frequency of the seed and host lasers overlap. As previously mentioned, this is done by tuning the temperature of the seed laser to match that of the host laser’s Nd:YAG rods, and by temperature stabilizing the host laser’s Nd:YAG rods to ensure long-term frequency overlap.

  • Page 231: Description Of Seeder System

    1.2 DESCRIPTION OF SEEDER SYSTEM A block diagram of the Series 101 injection seeding system is given in Figure 1-9. The elements of the system are described below. To Piezoelectric Q-Switch Frequency Tuning Trigger Element Q-Switch Build-up Time Reduction Circuit NPRO Crystal on Half-Wave Plate Photodiode...

  • Page 232: Collimating Lens And Half-Wave Plate

    Figure 1-10: NPRO Laser Design 1.2.2 Collimating Lens and Half-wave Plate The collimating lens is used to ensure that a small diameter, well collimated beam is transmitted through the Faraday isolator for maximum throughput and isolation. The half-wave plate matches the NPRO output polarization to that of the Faraday isolator. 1.2.3 Faraday Isolator The Faraday isolator is included in the injection seeder for two essential reasons: To prevent any backward propagating radiation from the host laser from destroying the...
  • Page 233 Laser Diode - The frequency of the laser diode emission is determined by the temperature of the laser diode. Consequently, the temperature of the laser diode is set so its frequency is within the Nd:YAG absorption band. NPRO Seed Laser Crystal - The output frequency of the NPRO is controlled via temperature.

  • Page 234: Host Laser Modifications

    1.3 HOST LASER MODIFICATIONS Figure 1-11 provides an example of the interrelationship of the Series 101 and a Nd:YAG host laser. A description of the modifications to the host laser follows. P iezoelectric S eries 1 0 1 F araday Series 101 "NP R O"...

  • Page 235: Polarizer Housing Window (Not Shown)

    1.3.3 Polarizer Housing Window (not shown) A window to allow the introduction of the seed laser beam into the host laser resonator is installed in the port in the Polarizer Housing, replacing the plug and 1.06 µm absorbing glass that normally reside there.

  • Page 236: List Of Terms

    1.4 LASER SAFETY 1.4.1 List of Terms The cautions and warnings used throughout this manual are explained below. Always read and understand this information. It is basic to the safe and proper operation of the system. WARNING: Hazardous to persons. An action or circumstance which may potentially cause personal injury or eye damage.

  • Page 237: Laser Emission Levels

    1.4.3 Laser Emission Levels The Series 101 lasers run continuous wave (CW) at 1064 nm or 1319 nm. Power will not exceed 425 mW. Laser diode emission is contained within the laser head. A filter glass on the aperture window reduces escaping diode light to less than 1 µW.
  • Page 238 Warning Label - Located on the side of the right side of the laser head. Aperture Label - Located on the front of the laser head, pointing towards the aperture. Certification Label - Located on the front of the laser head and on the rear of the controller. Figure 1-12: Injection Seeder Labels...
  • Page 239 Rear Certification Label Front View Aperture Label Aperture Shutter Right Side View Warning Label Figure 1-13: Laser Head Safety Features and Labels...

  • Page 240: Section 2: Installation

    SECTION 2: INSTALLATION Proper installation of the injection seeder consists of making modifications to the host laser and then installing the seeder. 2.1 HOST LASER MODIFICATIONS Proper preparation of the host laser is essential for good seeder operation. Prior to making the necessary host laser modifications, the host laser must be operating properly.

  • Page 241: Marx Bank

    2.1.1 Marx Bank If the host laser does not have a Marx bank for the Q-switch, one should be installed before proceeding. For injection seeding, the rise time of the waveform should be approximately 30 ns. 2.1.2 Cooling Water Stabilization The cooling system should be modified to include a regulator such that the temperature of the Nd:YAG rods is stabilized to within ±1°C.

  • Page 242: Polarizer Assembly Modifications

    2.1.4 Polarizer Assembly Modifications The seed laser beam is usually injected into the host resonator through the polarizer assembly next to the Q-switch. In most cases this will require the polarizer to be modified. A procedure for modifying a typical polarizer assembly and a sketch of a typical assembly are given below. A d ju stm e n t S c re w Ro cke r...

  • Page 243: Quarterwave Waveplate Installation

    2.1.5 Quarterwave Waveplate Installation Quarterwave waveplates should be added to each side of the Nd:YAG rod to produce a "twisted mode" in the rod. Typically, one waveplate is added in the polarizer mount and the other in the output coupler mount. A typical procedure for adding the waveplates follows. Quarterwave Quarterwave Analyzing...

  • Page 244: Piezo Installation

    2.1.6 Piezo Installation A piezoelectric element is supplied with the seeder, and this piezo should be attached to the rear reflector of the host laser to control its length (frequency). The piezo assembly as supplied by Lightwave is shown below in Figure 2-5 (Lightwave does not supply the HR end mirror). A typical procedure for installing the piezo is given below.

  • Page 245: Seeder Installation

    2.2 SEEDER INSTALLATION Proper preparation of the host laser is essential for good seeder operation. Prior to making the necessary seeder modifications, the host laser must be operating properly (see Section 2.1). It may be necessary to refer to Section 3 to understand how to turn on/off the seeder and other seeder functions before proceeding with this section.

  • Page 246: Gross Mirror Alignment

    5. Plug the piezo element’s lead into the connector on the front of the Series 101 laser head labeled "PZT". 6. Split the signal from the Q-switch trigger source and route this signal to the BNC connector on the front of the Series 101 laser head labeled "TRIGGER IN". 2.2.2 Gross Mirror Alignment All seeder/host laser systems require some beam steering mirrors to manipulate the seed beam into the host cavity and make the host and seed beams colinear at the output of the host laser.

  • Page 247: Frequency Overlap Adjustment

    2. Turn on the host laser to normal Q-switch operation. 3. Record the output energy of the host laser. 4. Adjust the Marx bank voltage to minimize the feedback from the host laser. 5. If the energy is >10 mJ/pulse after minimizing feedback, turn off the laser system. Contact the host laser manufacturer or otherwise modify the Marx bank such that the feedback is <10 mJ/pulse.
  • Page 248 4. Set the seeder Mode Switch to AUTO. LED 2 (green) on the seeder control PCB should flash at one-half the laser repetition rate of the host laser. Use a business card (or like) to block and unblock the seed laser beam before the Faraday isolator. 5.

  • Page 249: Fine Mirror Alignment

    2.2.5 Fine Mirror Alignment 1. Turn the host laser to low energy, long pulse operation. 2. Turn the Control Switch and Key Switch on the injection seeder to ON. The emission indicator light should turn on. Confirm that there is output at the seeder with an IR card. 3.

  • Page 250: Section 3: Operation

    SECTION 3: OPERATION 3.1 CONTROL PANEL The key operational procedures in the use of the injection seeding system involve the controller’s front panel (control panel). The control panel is shown in Figure 3-1, while descriptions of the various features follow. Emission Mode Frequency BNC...

  • Page 251: Reset Indicator

    The Mode Switch is a three position switch which controls the servo reset system. MANUAL (MNL) The build-up time reduction control circuit is not active. The piezoelectic voltage is reset and held at the center of its range. AUTO The build-up time reduction control circuit is active. The servo reset system automatically resets to the center of the piezoelectric voltage range whenever the piezo voltage nears the end of its range.

  • Page 252: Build-Up Time Bnc

    The Piezo BNC provides a voltage ranging from -4 to +4 volts, proportional to 1/100th the voltage applied to the piezo. The center of the piezo range is equivalent to 0 volts. Thus, -400, 0 and +400 volts on the piezoelectric element corresponds to -4, 0, and 4 volts, respectively, at the Piezo BNC output.

  • Page 253: Diode Current Led

    These two LEDs indicate the status of the TEC under the laser crystal. The red LED indicates the TEC is heating, while the green LED indicates it is cooling. When the laser is initially turned on, one of these lights may be very bright as the crystal temperature stabilizes. After the crystal temperature stabilizes both LEDs should be on, although the intensities of the two LEDs will be different in most cases.

  • Page 254: System Start Up

    3.3 SYSTEM START UP Turn on the host laser. Turn the injection seeder Control Switch to STANDBY. With the host laser Q-switch mode in OFF, or EXTERNAL, turn the lamp power for both the oscillator and amplifier (if applicable) up to their desired operating levels.
  • Page 255 Figure 3-3: Temporal Profile of Seeded and Unseeded Pulses The top left picture is an oscilloscope trace of 200 pulses emitted from an injection- seeded host laser. The top right picture is a single injection-seeded pulse. The bottom left picture is a single, unseeded pulse. These temporal profile photos were taken using a Tektronix 7104 (1GHz) oscilloscope and a Hamamatsu planar photodiode.

  • Page 256: Section 4: Maintenance

    SECTION 4: MAINTENANCE The following sections discuss seeder and host laser service which can be performed in the field if the system is not performing properly. 4.1 HOST LASER MAINTENANCE The injection seeder assembly is factory aligned and adjusted. There are no parts within the injection seeder requiring routine maintenance.

  • Page 257: Seeder/Host System Service

    4.2 SEEDER/HOST SYSTEM SERVICE Any service concerning the host laser optics should be performed with an awareness of the potential impact on the injection seeder and the injection seeding process. Common examples are given below. • Changing the host laser's Nd:YAG rod requires checking the frequency overlap between the seed and host lasers.

  • Page 258: Section 5: Troubleshooting

    SECTION 5: TROUBLESHOOTING SYMPTOM #1: Electronics Do Not Lock POSSIBLE CAUSE: Piezoelectric element disabled. REMEDY: Verify that the Mode Switch is in AUTO. Check piezoelectric connection and installation in high reflecting mirror mount. POSSIBLE CAUSE: Q-switch BUT circuit not receiving proper signals: Trigger and Photodiode LED does not flash at 1/2 the host repetition rate.
  • Page 259 POSSIBLE CAUSE: Poor frequency overlap. REMEDY: Recheck the frequency overlap, per Section 2.2.4, to verify that the seed laser frequency laser is not adjusted to run near a mode hop. POSSIBLE CAUSE: Host laser has excessive vibration or misalignment. REMEDY: Check the host laser for sources of vibration or misalignment, such as cooling hoses touching the mirror mounts or the seeder support platform.
  • Page 260 POSSIBLE CAUSE: External cooling water has frequent and large pressure fluctuations. REMEDY: Check external cooling water for pressure fluctuations. Install pressure regulator set at 20 psi if necessary. SYMPTOM #6: Q-switch BUT Reduction Changes (slowly) by more than 10% after external cooling water is flowing.

  • Page 261: Appendices

    APPENDICES...

  • Page 262: Appendix I: Product Specifications

    APPENDIX I: PRODUCT SPECIFICATIONS HOST SPECIFICATIONS Performance Parameter Specification 1) Spatial Mode 1) TEMoo or DCR "dot" (see Note 2) 2) Beam Diameter 2) Unaffected by seeding 3) Beam Divergence 3) Unaffected by seeding 4) Beam Pointing Stability 4) Unaffected by seeding 5) Output Pulse Time Jitter 5) 1 nsec rms from sync pulse is typical 6) Pulse to Pulse Energy Stability...

  • Page 263: Appendix Ii: Footnotes

    APPENDIX II: FOOTNOTES 1. W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York,1976). 2. A.E. Siegman & R. Arathoon, "Modes in Unstable Optical Resonators and Lens Waveguides", IEEE J. Quantum Electronics, 3, 156 (1967). 3. L.A. Rahn, "Feedback Stabilization of an Injection Seeded Nd:YAG Laser", Appl. Opt. 24, 940 (1985) 4.
  • Page 264 2400 Charleston Road Mountain View California 94043 650.962.0755 650.962.1661 E-mail Sales@lwecorp.com Service@lwecorp.com W W W http://www.lwecorop.com...
  • Page 265 Chapter VIII – Operator Notes Chapter VIII Operator Notes 996-0255 rev. b...
  • Page 266 Precision II Operation and Maintenance Manual 996-0255 rev. b...
  • Page 267 Chapter VIII – Operator Notes 996-0255 rev. b...
  • Page 268 Precision II Operation and Maintenance Manual 996-0255 rev. b...
  • Page 269 Chapter VIII – Operator Notes 996-0255 rev. b...
  • Page 270 Precision II Operation and Maintenance Manual 996-0255 rev. b...
  • Page 271 Chapter VIII – Operator Notes 996-0255 rev. b...
  • Page 272 Precision II Operation and Maintenance Manual 996-0255 rev. b...
  • Page 273 Chapter VIII – Operator Notes Index external controls 3-6 External triggering. See Triggering: Alignment external 811U-09 5-20 Eye safety 1-2 Burn pattern diagram 5-9 Dual head IR 5-23 Dual amplifier IR 5-22 Free running 5-10 Eliminating free-running 5-17 Free-running LNE 2-9 eliminating 5-17 oscillator optimization 5-12 Quartz rotator 5-24...
  • Page 274 Precision II Operation and Maintenance Manual System operation shutdown 2-2 Maintenance startup 2-1 cleaning optics 4-1 flashlamp replacement 4-2 replacing DI filter 4-7 Triggering Direct Access (DAT) 2-11 external 2-11 no entries RS232 operation 2-15 Stanford pulse generator setup 2-13 Troubleshooting electronic 5-8 Optical safety 1-2...

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