New Focus Vortex 6000 Series User Manual
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New Focus Vortex 6000 Series User Manual

Tunable diode laser
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  • Page 1 (217) 352-9330 | Click HERE Find the Newport / New Focus 6000 Vortex at our website:...
  • Page 2 Vortex6000.book Page 1 Tuesday, February 19, 2002 3:25 PM U S E R ’ S G U I D E 6000 Vortex Series Tunable Diode Laser U.S. Patents #5,319,668 & #5,995,521 and European Patent #0 693 231 B1 Use of controls or adjustments, or performance of procedures other than those specified herein, may result in hazardous radiation exposure.
  • Page 3 Vortex6000.book Page 2 Tuesday, February 19, 2002 3:25 PM Warranty New Focus, Inc. guarantees its Vortex lasers to be free of material and workmanship defects for one year from the date of shipment or 3,000 hours of operation, whichever comes first. This warranty is in lieu of all other guarantees expressed or implied and does not cover incidental or consequential loss.

  • Page 4: Table Of Contents

    Vortex6000.book Page 3 Tuesday, February 19, 2002 3:25 PM Contents User Safety Introduction ........5 Laser Safety .
  • Page 5 Laser Head and Mounting Bracket ....58 Appendix II: RS-232 Connector Wiring Index 4 • Contents NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 6: User Safety

    User Safety Introduction Your safe and effective use of this product is of utmost importance to us at New Focus. Please read the following laser safety information before attempting to operate the laser. Laser Safety The laser radiation emitted from this unit may be harmful. Always follow these precautions: •...
  • Page 7 This product conforms to the applicable requirements of 21 CFR 1040.10 and 1040.11 at the date of manufacture. Front of laser head Aperture labels Certification label 6 • User Safety NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 8: Using The Safety Interlock

    Vortex6000.book Page 7 Tuesday, February 19, 2002 3:25 PM Figure 2: Labels on the back of the laser head Back of laser head Danger labels Using the Safety Interlock The safety interlock connector on the back of the Vortex controller is provided for external safety systems.
  • Page 9 Vortex6000.book Page 8 Tuesday, February 19, 2002 3:25 PM 8 • User Safety NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 10: Getting Started

    If parts are missing or you notice any signs of damage, such as dented or scratched covers, or broken knobs, please contact New Focus immediately. For orders with multiple heads, up to 3 heads may be shipped in the same...

  • Page 11: Setting Up The Laser

    3. Connect the head and controller: Connect the controller to the laser head with the 26-pin D-connector laser cable provided. Use only the supplied New Focus laser cable to connect the controller to the laser head. To ensure proper and safe operation of the laser, secure the cable to the laser head and controller using the captive attachment screws in the cable’s D-connectors.

  • Page 12: Starting The Vortex For The First Time

    The degree of isolation required depends on how you are using the laser; contact New Focus technical support for help with your particular application. Starting the Vortex for the First Time The following section takes you through the basic steps of starting up and shutting down the laser.
  • Page 13 (the LED on the button will turn off) and before shutting down the system. Turn the keyswitch off (position “ 0 ”) to shut down the entire system. 12 • Getting Started NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 14: General Operation

    Vortex6000.book Page 13 Tuesday, February 19, 2002 3:25 PM General Operation Overview The Vortex is a robust, narrow-linewidth, laser source. The system consists of a laser controller, a laser head, and a laser cable. Each Vortex laser head contains head-specific information so that it can be used with any Vortex laser controller.

  • Page 15: Mounting The Laser Head

    The mounting bracket adds one additional inch (25.4 mm) to the beam height. To raise the beam height, additional risers are available from New Focus (model number 6001). Optically Isolating the Laser After mounting the laser head, take precautions to prevent back reflections into the laser aperture.

  • Page 16: Using The Front-Panel Controls

    Vortex6000.book Page 15 Tuesday, February 19, 2002 3:25 PM Using the Front-Panel Controls The Vortex has two control options, local and remote. In local mode, the front panel provides control of the laser system. In remote mode, you control the laser over the computer interface (IEEE-488 or RS-232). Whenever the Vortex receives a command over the computer interface, it automatically deactivates most of the front-panel controls (the Local button, which restores local control, and the Power button and power...
  • Page 17 14. Baud Rate Button: Displays the RS-232 baud-rate setting. See “Using the RS-232 Interface” on page 30 for more information. 16 • General Operation NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 18: Turning On The Power

    Vortex6000.book Page 17 Tuesday, February 19, 2002 3:25 PM Turning on the Power Before turning on the system for the first time, check that the AC line voltage indicator on the back of the controller matches the voltage you are using (see page 53). To turn on the Vortex: 1.
  • Page 19 2. Press the Mode button to switch modes. The mode indicator on the front panel will change to show the newly selected mode. 18 • General Operation NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 20: Displaying And Setting The Laser Parameters

    Vortex6000.book Page 19 Tuesday, February 19, 2002 3:25 PM 3. Press the Power button to re-activate the laser head. In order to use the Vortex in constant-power mode, you will need to use a beamsplitter and a photodetector (see “Constant-Power Mode” on page 25 for details).

  • Page 21: Restoring Local (Front-Panel) Control

    Modulation Input You can also use the current-modulation inputs for fine-frequency (fine-wavelength) control because the frequency changes with the current. 20 • General Operation NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 22 Vortex6000.book Page 21 Tuesday, February 19, 2002 3:25 PM Modulating the Frequency You can modulate the laser frequency (wavelength) by using an externally generated analog signal to modulate the voltage of the piezoelectric actuator (the piezo directly controls the laser frequency). To modulate the frequency, connect the line for the input signal to the Frequency Modulation connector on the back of the Vortex controller.
  • Page 23 The front-panel current readout does not reflect the modulation input. You can calculate the actual current by adding the current shown on the front-panel display to the modulation input. 22 • General Operation NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 24: Reading An Input Signal

    Vortex6000.book Page 23 Tuesday, February 19, 2002 3:25 PM Using the High-Speed Current Modulation Input You can use the SMA connector on the back of the laser head to modulate the current at high speeds. 1. Turn off the diode power (the light in the Power button should be off).
  • Page 25 10 kΩ The update rate for the Auxiliary Input can vary, depending on processor Note: Note: demands, from 10–100 milliseconds. 24 • General Operation NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 26: Constant-Power Mode

    Vortex6000.book Page 25 Tuesday, February 19, 2002 3:25 PM Constant-Power Mode Introduction When operating in constant-power mode, the controller adjusts the laser current to maintain a stable output power. Only the power and the laser’s wavelength (controlled by the piezo voltage) can be varied in this mode.

  • Page 27: Operating In Constant-Power Mode

    10 mW, and a 10% beamsplitter, the detector conversion gain must be 4000 V/W. Recommended detectors are the New Focus 2001 and 2011, as they provide sufficient gain and the gain is adjustable. Operating in Constant-Power Mode...
  • Page 28 Vortex6000.book Page 27 Tuesday, February 19, 2002 3:25 PM 8. On the controller, press the Display button until the display shows the reading for the auxiliary input (“Aux x.x”). 9. Adjust the beam position on the photodetector to maximize the voltage being displayed.
  • Page 29 Vortex6000.book Page 28 Tuesday, February 19, 2002 3:25 PM 28 • Constant-Power Mode NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 30: Computer Control

    Vortex6000.book Page 29 Tuesday, February 19, 2002 3:25 PM Computer Control Introduction The Vortex laser system can be operated remotely through either the parallel IEEE-488 (GPIB) interface or the serial RS-232 interface. Most computers have RS-232 interfaces built in. In order to use the IEEE-488 interface, a special card or interface box is necessary.

  • Page 31: Using The Rs-232 Interface

    Available baud rates are 300, 1200, 2400, 4800, 9600, 19200, 38400, and 57600. 4. Press the Baud Rate button again to return to the normal display. 30 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 32: Restoring Local (Front-Panel) Control

    Vortex6000.book Page 31 Tuesday, February 19, 2002 3:25 PM Restoring Local (Front-Panel) Control When the Vortex receives a command from the computer interface, it deactivates most of the front-panel controls. This remote-control mode is indicated by the “Remote” LED on the front panel. To return the controller to local (front-panel) control, press the Local button on the front panel.
  • Page 33 • For IEEE-488, the Status Byte is very important to successful communication with the Vortex. The Message Available (MAV) bit 32 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 34 Vortex6000.book Page 33 Tuesday, February 19, 2002 3:25 PM in the Status Byte indicates whether or not data is waiting in the output buffer. Always check that the MAV bit is set before reading back information. If the output buffer is empty, the read will fail. The best way to check the Status Byte is to use a serial poll.

  • Page 35: Command Summary

    Set System Operating Mode :CONF:MOD: <mode> Query System Operating Mode :CONF:MOD? Turn On/Off Power to the Laser Head :OUTP <power> 34 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 36 Vortex6000.book Page 35 Tuesday, February 19, 2002 3:25 PM Syntax Command Page Query Laser Head Power :OUTP? Sense Auxiliary Voltage :SENS:VOLT:AUX Current/Diode Commands Syntax Command Page Set Diode Current :SOUR:CURR <current> Query Diode Current Setpoint :SOUR:CURR? Sense Diode Current :SENS:CURR Sense Laser Temperature :SENS:TEMP Power/Laser Commands...

  • Page 37: Command Definitions

    firmware revision. Example *IDN? ⇒ New Focus,I6000 H6013,I059,H623,3.3 (Manufacturer = New Focus, Controller Model = 6000, Head Model = 6013, Controller S/N =059, Head S/N = 623, Firmware ver. 3.3) Reset Command Syntax *RST...

  • Page 38: Esr

    Vortex6000.book Page 37 Tuesday, February 19, 2002 3:25 PM Query Standard Event Status Register Syntax *ESR? Returns the value of the Event Status Register and Vortex Actions then clears the register (returns all bits to 0). An integer in the range 0 to 255, corresponding to Response the combined weight of the bits that are set.

  • Page 39: *Ese < Value

    Enable ESB in case of query error. not used not used Enable the ESB if the system is restarted: Example *ESE 128 38 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 40: Ese

    Vortex6000.book Page 39 Tuesday, February 19, 2002 3:25 PM Query Standard Event Status Enable Register Query Syntax *ESE? Queries the Event Status Enable Register Vortex Actions An integer in the range 0 to 255, corresponding to Response the combined weight of the bits that are set. See the “Set Standard Event Status Enable Register”...

  • Page 41: Stb

    Check the Status Byte: Example *STB? ⇒ 16 (there is data in the output buffer) 40 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 42: *Sre < Value

    Vortex6000.book Page 41 Tuesday, February 19, 2002 3:25 PM Set Service Request Enable Register Syntax *SRE < value> Sets the specified bits of the Service Request Enable Vortex Actions Register. When a corresponding bit in the Status Byte Regis- ter becomes true, enables bit Master Summary Sta- tus Bit (MSS) of the Status Byte (when serial polling, generates a service request).

  • Page 43: Sre

    0 to 65536 (7.5 years) Query Laser Head Manufacturing Date Syntax :SYSTem:INFormation:HMANufacture? Returns the date of laser head manufacture. Vortex Actions “mm-dd-yy” (Month-Day-Year) Response 42 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 44: Laser Head Operating Hours

    Vortex6000.book Page 43 Tuesday, February 19, 2002 3:25 PM Query Laser Head Operating Hours Syntax :SYSTem:INFormation:DHOurs? Returns the laser head operating time. Vortex Actions “xxxxxHrs.” Response range: 0 to 65536 (7.5 years) Query Laser Head Wavelength Syntax :SYSTem:INFormation:HWAVelength? Returns the nominal head wavelength. Vortex Actions “x.xx nm”...

  • Page 45: Outp Turn On/Off Power To The Laser Head

    (the laser is turned on) Sense Auxiliary Voltage Syntax :SENSe:VOLTage:AUXiliary Returns the auxiliary input-voltage reading. Vortex Actions “x.xxxV” Response range: 0.0 to 4.000 44 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 46: Set Diode Current

    Vortex6000.book Page 45 Tuesday, February 19, 2002 3:25 PM Current/Diode Commands Set Diode Current Syntax :SOURce:CURRent < current> Vortex Actions Sets the diode-current setpoint when in constant- current mode. Argument range: 0.0 to 160.0, units are in mA Example Set the diode current to 88.8 mA. :SOUR:CURR 88.8 Query Diode Current Setpoint Syntax...

  • Page 47: Sense Laser Temperature

    In constant-current mode: “xx.xmW” range: 0.0 to Max Power (laser specific) Check the laser power setpoint: Example SOUR:POW? ⇒ 52.8% 46 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 48: Sense Laser Power

    Vortex6000.book Page 47 Tuesday, February 19, 2002 3:25 PM Sense Laser Power Syntax :SENSe:POWer Returns the laser-power reading. Vortex Actions In constant-power mode: Response “xx.x%” range: 0.0 to 100.0 In constant-current mode: “xx.xmW” range: 0.0 to Max Power (laser specific) Wavelength (Piezo Voltage) Commands Set Piezo Voltage Syntax...

  • Page 49: Set Frequency Modulation Gain

    :CONF:GAIN? Queries the frequency-modulation gain setting Vortex Actions (default setting is high). “HIGH” or “LOW” Response Gain factor: High=25, Low=1 48 • Computer Control NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 50: Principles Of Operation

    Vortex6000.book Page 49 Tuesday, February 19, 2002 3:25 PM Principles of Operation Overview Traditional diode-laser technology provides high reliability, high electrical efficiency, and a wide range of available wavelengths in a compact package. By using an external cavity built around a diode laser, the Vortex enhances the performance of off-the-shelf diode lasers, guaranteeing single-mode operation with narrow linewidth and precise wavelength tuning.
  • Page 51 The magnitude of the effect is diode dependent, but is typically 25–150 MHz/mA. 50 • Principles of Operation NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 52 Vortex6000.book Page 51 Tuesday, February 19, 2002 3:25 PM References T. Day, F. Luecke, and M. Brownell, “Continuously tunable diode lasers,” Lasers and Optronics, pages 15–17, June 1993. K. C. Harvey and C. J. Myatt, “External-cavity diode laser using a grazing-incidence diffraction grating,”...
  • Page 53 Vortex6000.book Page 52 Tuesday, February 19, 2002 3:25 PM 52 • Principles of Operation NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 54: Changing The Ac-Voltage Selection

    Vortex6000.book Page 53 Tuesday, February 19, 2002 3:25 PM Changing the AC-Voltage Selection The Vortex Controller can operate at 100, 120, 220, or 240 V AC, at AC frequencies of 47–63 Hz. The unit is configured at the factory for the standard AC voltage of the purchaser’s country.
  • Page 55 6. Close the power-module cover. 7. Verify the proper voltage is showing through the module window. 8. Reconnect the AC-power cord. 54 • Changing the AC-Voltage Selection NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 56: Customer Service

    The Vortex is designed as a maintenance-free laser, thus there are no scheduled service actions. If your laser does require service, repair, or calibration, please call for a Return Authorization Number before shipping the unit to New Focus. Technical Support Information and advice about the performance or operation of your Vortex laser is available from our applications engineers.
  • Page 57 Vortex6000.book Page 56 Tuesday, February 19, 2002 3:25 PM 56 • Customer Service NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 58: Appendix I: Physical Specifications

    Vortex6000.book Page 57 Tuesday, February 19, 2002 3:25 PM Appendix I: Physical Specifications Controller Controller Weight: 14 lbs (7 kg) 6000 Vortex Series Appendix I: Physical Specifications • 57 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 59: Laser Head And Mounting Bracket

    Detail of the Laser Head/Bracket Assembly. 1.000" 3.000" Weight of Laser Head and mounting bracket: 2 lbs (1 kg) 58 • Appendix I: Physical Specifications NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 60: Appendix Ii: Rs-232 Connector Wiring • 59

    Vortex6000.book Page 59 Tuesday, February 19, 2002 3:25 PM Appendix II: RS-232 Connector Wiring RS-232 9-Pin D-Connector The RS-232 connector on the back of the Vortex controller is a standard female 9-pin D-connector. The laser controller transmits data on pin 2 and receives data on pin 3 (see below). If you have trouble communicating with the laser over the RS-232 port, you may need to use a null-modem adapter or cable.
  • Page 61 Vortex6000.book Page 60 Tuesday, February 19, 2002 3:25 PM 60 • Appendix II: RS-232 Connector Wiring NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 62: Index

    Vortex6000.book Page 61 Tuesday, February 19, 2002 3:25 PM Index current modulating 22 AC voltage, checking or changing 53 setting 19 address, setting for GPIB 30 auxiliary input 19, 23 displaying input signals 19, 23 baud rate, setting for RS-232 30 beam height 14 frequency beamsplitter 26...
  • Page 63 21 temperature considerations mounting bracket 14 heatsinking 14 mounting the laser head 14 warming up 17 turning on the Vortex 17 62 • Index NEW FOCUS Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 64 Vortex6000.book Page 63 Tuesday, February 19, 2002 3:25 PM voltage checking or changing AC voltage 53 setting piezo voltage 19 warming up the Vortex 17 wavelength modulating 21 ranges by model number 6 tuning 19 wiring diagram, RS-232 connector 59 Index •...
  • Page 65 Vortex6000.book Page 64 Tuesday, February 19, 2002 3:25 PM 64 • Index NEW FOCUS Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

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