THORLABS ITC8000 Operation Manual
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THORLABS ITC8000 Operation Manual

THORLABS ITC8000 Operation Manual

Modular combined laser current and temperature controllers
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PRO800 / PRO8000 (-4) Series
Modular Combined Laser Current
and Temperature Controllers
ITC8000
Operation Manual
2016

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Summary of Contents for THORLABS ITC8000

  • Page 1 PRO800 / PRO8000 (-4) Series Modular Combined Laser Current and Temperature Controllers ITC8000 Operation Manual 2016...
  • Page 2 Version: Date: 08-Sep-2016 Item No.: M0009-510-221 Copyright © 2016 Thorlabs...

  • Page 3: Table Of Contents

    Contents Foreword 1 General Information 1.1 Safety 1.2 Ordering Codes and Accessories 2 Getting Started 2.1 Parts List 2.2 Operating Principle 2.3 Operating Elements 3 External Connections ITC8xxx 3.1 Laser Diode Controller 3.1.1 Connecting the Laser and Monitor Diodes 3.1.2 Connecting Interlock and Status Display 3.2 Temperature Controller 3.2.1...
  • Page 4 6.3.6 Selecting Constant Current or Constant Power Mode 6.3.7 Selecting the Type of the Temperature Sensor 6.3.8 Thermistor Calibration 6.3.9 Temperature Window 6.3.10 Setting the P, I and D Share of the Control Loop 6.4 Switching ON and OFF 6.5 Error Messages 7 Communication with a PC 7.1 Nomenclature 7.2 Data Format...
  • Page 5 7.5.10 Device Error Event Enable Register (EDE) 8 Maintenance and Service 8.1 Troubleshooting 9 Appendix 9.1 Technical Data 9.2 Certifications and Compliances 9.3 Literature 9.4 Warranty 9.5 Copyright and Exclusion of Reliability 9.6 Thorlabs 'End of Life' Policy 9.7 List of Acronyms 9.8 Thorlabs Worldwide Contacts...

  • Page 6: Foreword

    Paragraphs preceeded by this symbol explain hazards that could damage the instrument and the connected equipment or may cause loss of data. Note This manual also contains "NOTES" and "HINTS" written in this form. Please read these advices carefully! © 2016 Thorlabs...

  • Page 7: General Information

    Prior to applying power to the ITC8000, make sure that the protective conductor of the mains power cord is correctly connected to the protective earth ground contact of the socket outlet!

  • Page 8: Ordering Codes And Accessories

    ITC8000 Thorlabs is not responsible for any radio television interference caused by modifications of this equipment or the substitution or attachment of connecting cables and equipment other than those specified by Thorlabs. The correction of interference caused by such unauthorized modification, substitution or attachment will be the responsibility of the user.

  • Page 9: Getting Started

    ("absolute hardware limit"). The values for the laser diode current (constant current mode), the monitor diode current (constant power mode) and the set temperature or set resistance of the ITC8000 modules are set with 16 bit resolution.
  • Page 10 · Separate over-temperature protection for each module Protection against thermal failure of the module. · Line failure protection In case of a line voltage failure the ITC8000 module must be switched on again manually. · Key-operated power switch Protection against unauthorized or accidental use.

  • Page 11: Operating Elements

    2 Getting Started 2.3 Operating Elements ITC8000 Modules Operating Elements ITC8000 © 2016 Thorlabs...
  • Page 12 ITC8000 ITC8000DS15 Modules Operating Elements ITC8000DS15 © 2016 Thorlabs...

  • Page 13: External Connections Itc8Xxx

    · TEC element for setting the chip temperature · Temperature sensor The laser diode and the TEC element are always sourced against ground by the ITC8000. This is of a considerable advantage with respect to the protection of the connected devices and to the current stability.

  • Page 14: Laser Diode Controller

    Interlock return pin; Status LED - Cathode (GND) Laser Diode LD cathode (with polarity AG) LD anode (with polarity CG) LD ground Monitor Diode Input monitor (photo) diode Ground monitor (photo) diode Laser Voltage Measurement Input - (cathode) + (anode) © 2016 Thorlabs...

  • Page 15: Connecting The Laser And Monitor Diodes

    2 and the inner conductor to pin 4. Connect laser and monitor diode to the connector jack of the ITC8000 module. The lines for voltage measurement of the laser diode (pin 6 and pin 9) must be connected as closely as possible to the laser diode to avoid measurement errors.
  • Page 16 The LED will light up when the laser output is switched on. R = 470 Ω Note Mispoling the LED may lead to a malfunction as the status of the interlock is then in an undefined range. © 2016 Thorlabs...

  • Page 17: Temperature Controller

    AD590 - (PT100 for ITC8xxxPT) AD590 + (PT100 for ITC8xxxPT) Connect the TEC element and the temperature sensor with shielded cables to the TEC connector. The shielding of the cable must be connected to ground (pin 13,14,15). © 2016 Thorlabs...

  • Page 18: Connecting A Thermistor

    The TEC element is connected between pins 5, 6 (plus pole) and pins 13, 14, 15 (minus pole). Connecting a TEC Element Attention An reverse poled TEC element may lead to a thermal runaway and destruction of the connected components. Please refer to section Polarity Check of the TEC Element © 2016 Thorlabs...

  • Page 19: Polarity Check Of The Tec Element

    · Connect TEC element and temperature sensor. The sensor must be in good thermal contact to the active surface of the TEC element. · Switch on the PRO8000 (-4) / PRO800 system. · Select the ITC8000 module. · Select the correct type of sensor. · Set the correct value for I...

  • Page 20: External Connections Itc8Xxxds15

    Monitor (photo) diode anode (or cathode with bias) Monitor (photo) diode ground Laser Voltage Measurement Input - (cathode) + (anode) Interlock; Status Display Output Interlock; Status LED - Anode Interlock return pin; Status LED - Cathode (GND) © 2016 Thorlabs...

  • Page 21: Connecting The Laser And Monitor Diodes - Itc8000Ds15

    2 and the inner conductor to pin 4. Connect laser and monitor diode to the connector jack of the ITC8000 module. The lines for voltage measurement of the laser diode (pin 9 and pin 12) must be connected as closely as possible to the laser diode to avoid measurement errors.

  • Page 22: Connecting A Thermistor - Itc8000Ds15

    4.4 Connecting an AD590 - ITC8000DS15 The IC-temperature sensor AD590 is connected between pin 6 (+) and pin 13 (-). 4.5 Connecting a LM335 - ITC8000DS15 The IC-temperature sensor LM335 is connected between pin 6, 10 (+) and pin 8 (-). © 2016 Thorlabs...

  • Page 23: Connecting A Tec Element - Itc8000Ds15

    The TEC element is connected between pins 7 (plus pole) and pins 8 (minus pole). Connecting a TEC Element Attention An reverse poled TEC element may lead to a thermal runaway and destruction of the connected components. Please refer to section Polarity Check of the TEC Element © 2016 Thorlabs...

  • Page 24: Optimization Of Temperature Control

    3. The transient response after setting a new temperature is limited since the heat transport in the copper block is relatively slow. Furthermore, the sensor must settle to the laser temperature - it also has a non-negligible thermal capacity. Possible optimization: careful adjustment of PID parameters © 2016 Thorlabs...

  • Page 25: Pid Adjustment

    Temperature control loops are comparatively slow; control oscillations appear with a frequency in the range of several Hz or parts of Hz. The PID adjustment allows to optimize the dynamic behavior. The ITC8000 modules allow to set the three parameters P, I and D independently within the range from 0.1% to 100%.

  • Page 26: Operating Instruction

    ITC8000 6 Operating Instruction Note All settings that are made to the ITC8000 modules via the Control Panel of the PRO8000 mainframe are applied immediately; no need to confirm settings. 6.1 Pre-Settings The maximum laser and TEC current values can be limited in order to protect the laser and the TEC element.

  • Page 27: Functions In The Main Menu

    The software laser current limit I is set in the channel menu or via the IEEE488 interface by the TE LIM control software, and affects the TEC current control of the ITC8000 module via the D/A converter. See section Changing Parameters 6.2 Functions in the Main Menu...
  • Page 28 Pressing the key completes the procedure. Note If the TEC current is switched ON, the actual temperature is displayed. In this case the set temperature can still be changed but is not displayed. © 2016 Thorlabs...

  • Page 29: Functions In The Channel Menu

    No sensor recognized, or recognized sensor does not match the setting. Only three parameters can be shown at a time, so there is a scroll function. All parameters are sorted in a virtual list, which can be run through with the cursor: © 2016 Thorlabs...
  • Page 30 Further lines follow, depending on the sensor type (examples shown): Thermistor Th.range=low Exponential RS = 9.1234 k RA = 9.1234 k Rwin= 6.1234k R0= 10.000 k B = 3900.0 T0= 25.000 °C C1= 1.1234E-3 C2= 2.1234E-4 C3= 3.1234E-6 AD590 AD590 © 2016 Thorlabs...

  • Page 31: Changing Parameters

    If, for example, is 0.5 A/W this can be entered in the channel menu by pressing the soft key CHANGE and changing the default value using the tuning knob. Then press the key to terminate the procedure. © 2016 Thorlabs...

  • Page 32: Bias Voltage For The Monitor Diode

    (Constant current mode) and (Constant power mode). 6.3.7 Selecting the Type of the Temperature Sensor The sensor type can be selected in the ITC8000 modules by selecting the line "Thermistor" respectively "AD590". AD590 = AD590 and LM335 families Thermistor = Thermistor.
  • Page 33 C1, C2 and C3. To change the three parameters in accordance with the actual thermistor, select them one by one and set them to the desired value. Pressing terminates the input and applies value. © 2016 Thorlabs...

  • Page 34: Temperature Window

    6.4 Switching ON and OFF Attention ITC8000 modules can be switched on or off at any time, with no regard if any parameters have been set! So make sure that the appropriate Pre-Settings are made prior to switching on the...
  • Page 35 The LED “TEC ON” on the front panel of the selected module lights up when switched TH off TH on on and the status display changes from In the main menu the displayed temperature set value changes to the actual temperature © 2016 Thorlabs...

  • Page 36: Error Messages

    . Laser current switched off. OPEN Connection to the laser was interrupted during operation, or the laser forward voltage exceeded the compliance voltage of the ITC8000 module. The laser current switched off. OPEN TEC Connection to the TEC element was interrupted during operation, or TEC resistance increased too high.
  • Page 37 If the error occurs when trying to switch on, it is displayed in cursor arrows: }CH1 No Sensor| Any error must be confirmed by pushing the " " soft key. Any further operation is locked until " " soft key is pushed. © 2016 Thorlabs...

  • Page 38: Communication With A Pc

    All analog values are read and written in SI units, i.e. A (not mA), W (not mW) etc. Letters may be written in lower or upper cases. Attention Prior to programming a ITC8000 module, the limit value of the laser diode current I (hardware limit) must be set using a screwdriver.

  • Page 39: Commands And Queries

    Queries the selected slot [:SLOT <NR1><LF>] 7.3.2 Query Type of Module (TYPE) Explanation Command Response Example Reading Reads the module ID (here 159 for ITC8000) ":TYPE:ID?" [:TYPE: 159<LF>] 7.3.3 Selecting the Photo Diode Polarity (PDPOL) Explanation Command Response Example Programming Selects Anode Grounded ":PDPOL AG"...

  • Page 40: Programming The Bias Voltage (Vbias)

    Manual for details. 7.3.6 Selecting the Laser Diode Polarity (LDPOL) Command Explanation Response Example Programming ":LDPOL AG" Selects Anode Grounded ":LDPOL CG" Selects Cathode Grounded Reading ":LDPOL?" Reads status of the laser output [:LDPOL AG<LF>] [:LDPOL CG<LF>] © 2016 Thorlabs...

  • Page 41: Reading The Laser Diode Hardware Limit (Limcp)

    Reads the maximum possible laser diode current limit [:LIMC:MAX <NR3><LF>] Reads the laser diode current limit for I - DAC = 0000 ":LIMC:MIN_W?" [:LIMC:MIN_W <NR3><LF>] Reads the laser diode current limit for I - DAC = FFFF ":LIMC:MAX_W?" [:LIMC:MAX_W <NR3><LF>] See also section Pre-Settings © 2016 Thorlabs...

  • Page 42: Setting The Laser Diode Current (Ild)

    Reads the position of the laser diode current as measurement ":ILD:MEAS?" value in the output string for “ELCH” (1..8, 0 if not selected) [:ILD:MEAS <NR1><LF>] *) ELCH = ELectrical CHaracterization, a PRO8000 Macro Function. Please see the PRO8000 Series Mainframe Manual for details. © 2016 Thorlabs...

  • Page 43: Setting The Monitor Diode Current (Imd)

    Reads the position of the monitor diode current as measurement ":IMD:MEAS?" value in the “ELCH” output string (1..8, 0 if not selected) [:IMD:MEAS <NR1><LF>] *) ELCH = ELectrical CHaracterization, a PRO8000 Macro Function. Please see the PRO8000 Series Mainframe Manual for details. © 2016 Thorlabs...

  • Page 44: Calibrating A Photodiode (Calpd)

    Reads the optical power for P - DAC = FFFF ":POPT:MAX_W?" [:POPT:MAX_W <NR3><LF>] Reads the optical power for P - ADC = 0000 ":POPT:MIN_R?" [:POPT:MIN_R <NR3><LF>] Reads the optical power for P - ADC = FFFF ":POPT:MAX_R?" [:POPT:MAX_R <NR3><LF>"] © 2016 Thorlabs...

  • Page 45: Activating The Temperature Protection (Tp)

    7.3.14 Switching the Laser Output On and Off (LASER) Explanation Command Response Example Programming Turns the laser output on ":LASER ON" Turns the laser output off ":LASER OFF" Reading Reads status of the laser output ":LASER?" [:LASER ON<LF>] [:LASER OFF<LF>] © 2016 Thorlabs...

  • Page 46: Reading The Laser Diode Voltage (Vld)

    Reads the minimum allowed TEC software current limit [:LIMT:MIN <NR3><LF>] ":LIMT:MAX?" Reads the maximum allowed TEC software current limit [:LIMT:MAX <NR3><LF>] Reads I - ADC = 0000 ":LIMT:MIN_W?" TE LIM [:LIMC:MIN_W <NR3><LF>] Reads I - ADC = FFFF ":LIMT:MAX_W?" TE LIM [:LIMC:MAX_W <NR3><LF>] © 2016 Thorlabs...

  • Page 47: Programming The Temperature (Temp)

    Reads T - ADC = 0000 ":TEMP:MIN_R?" [:TEMP:MIN_R <NR3><LF>] Reads T - ADC = FFFF ":TEMP:MAX_R?" [:TEMP:MAX_R <NR3><LF>] ":TEMP:MEAS?" TEMP Reads the position of as measurement value in the “ELCH” output string (1..8, 0 if not selected) [:TEMP:MEAS <NR1><LF>] ) ELectrical CHaracterization © 2016 Thorlabs...

  • Page 48: Programming The Temperature Window (Twin)

    Reads the minimum allowed set resistance window. ":RWIN:MIN?" [:RWIN:MIN <NR3><LF>] Reads the maximum allowed set resistance window. ":RWIN:MAX?" [:RWIN:MAX <NR3><LF>] ":RWIN:MIN_W?" Reads R - DAC = 0000 [:RWIN:MIN_W <NR3><LF>] Reads R - DAC = FFFF ":RWIN:MAX_W?" [:RWIN:MAX_W <NR3><LF>] © 2016 Thorlabs...

  • Page 49: Selecting The Sensor (Sens)

    Reads R - ADC = 0000 [:RESI:MIN_R <NR3><LF>] ":RESI:MAX_R?" Reads R - ADC = FFFF [:RESI:MAX_R <NR3><LF>] Reads the position of R as measurement value in the “ELCH” ":RESI:MEAS?" output string (1..8, 0 if not selected) [:RESI:MEAS <NR1><LF>] ) ELectrical CHaracterization © 2016 Thorlabs...

  • Page 50: Thermistor Calibration - Exponential Method

    Refer to section Thermistor Calibration - Exponential Method Attention These commands do not apply to ITC8000-KRYO! Note The selection by which method (exponential or Steinhart-Hart) the sensor calibration will be executed, depends on the order in which the coefficients are transmitted: ·...

  • Page 51: Thermistor Calibration - Steinhart-Hart Method

    Refer to section Thermistor Calibration - Steinhart-Hart Method Attention These commands do not apply to ITC8000-KRYO! Note The selection by which method (exponential or Steinhart-Hart) the sensor calibration will be executed, depends on the order in which the coefficients are transmitted: ·...

  • Page 52: Programming The Pid Shares (Sharep, Sharei, Shared)

    7.3.25 Switching the I Share On / Off (INTEG) Explanation Command Response Example Programming Switches the I share on ":INTEG ON" ":INTEG OFF" Switches the I share off Reading Reads the status of the I share ":INTEG?" [:INTEG ON<LF>] [:INTEG OFF<LF>] © 2016 Thorlabs...

  • Page 53: Switching The Tec On / Off (Tec)

    Reads the maximum TEC current for I - ADC = FFFF [:ITE:MAX_R <NR3><LF>] Reads the position of the TEC current as measurement value in ":ITE:MEAS?" the “ELCH” output string (1..8, 0 if not selected) [:ITE:MEAS <NR1><LF>] ) ELectrical CHaracterization © 2016 Thorlabs...

  • Page 54: Reading The Tec Voltage (Vte)

    ":VTE:MAX_R?" Reads the maximum U - ADC = FFFF [:VTE:MAX_R <NR3><LF>] Reads the position of the TEC voltage as measurement value in ":VTE:MEAS?" the “ELCH” output string (1..8, 0 if not selected) [:VTE:MEAS <NR1><LF>] ) ELectrical CHaracterization © 2016 Thorlabs...

  • Page 55: Ieee Error Messages

    Reason: The operating mode CC or CP cannot be changed while the laser output is switched on. [1312,"Wrong or no sensor"] Reason: Attempt to switch on the TEC controller, while no sensor is connected or wrong sensor is selected. © 2016 Thorlabs...
  • Page 56 Reason: Attempt to switch on the laser while the laser temperature is outside of the temperature window. [1316,"Attempt to activate Twin during laser on"] Reason: The temperature window cannot be activated while the laser output is switched on. © 2016 Thorlabs...

  • Page 57: Status Reporting

    7 Communication with a PC 7.5 Status Reporting The ITC8000 module provides three 16 bit registers DEC Device Error Condition Register DEE Device Error Event Register EDE Device Error Event Enable Register together with four 8 bit registers of the PRO8000 mainframe...
  • Page 58 ITC8000 Structure of the registers DEC, DEE and EDE © 2016 Thorlabs...
  • Page 59 7 Communication with a PC Structure of the registers ESR, ESE, STB and SRE © 2016 Thorlabs...

  • Page 60: Standard Event Status Register (Esr)

    This bit is HIGH, after a command has finished and all bits of the STB have been set. All bits except bit 6 of the STB can be used to assert a service request (SRQ ). Alternatively the "*STB?" SRQ can be recognized using the command or by serial poll © 2016 Thorlabs...

  • Page 61: Service Request Enable Register (Sre)

    For ITC8000 modules the bits 0 to 6 and 8 are used Bit 0 - Over temperature ITC8000 is overheated. Wait until the module has cooled down. Maintain proper air flow. Bit 1 - Open circuit (LD) Laser diode circuit is open.

  • Page 62: Device Error Event Register (Dee)

    "OR" so that any "hit" leads to a logical 1 in bit 3 (DES) of the STB. As any bit of the STB can assert an SRQ, every error (bit of the DEE) can be used to assert an SRQ. © 2016 Thorlabs...

  • Page 63: Maintenance And Service

    8 Maintenance and Service 8 Maintenance and Service Protect the ITC8000 from adverse weather conditions. The ITC8000 is not water resistant. Attention To avoid damage to the instrument, do not expose it to spray, liquids or solvents! The unit does not need a regular maintenance by the user. It does not contain any modules and/or components that could be repaired by the user himself.
  • Page 64 Ø Is the laser diode installed properly? § Control the connection cable. Ø Is the laser diode poled correctly? § If not, change the polarity of the laser diode corresponding to the type of ITC8000 module (AG or CG) Ø Is the photo diode connected properly? §...
  • Page 65 Thermistor Calibration Ø Is the PID loop set up correctly? § Verify the PID share adjustment, see section PID Adjustment If above hints could not resolve the malfunction, please contact Thorlabs for technical support and/or return instructions. © 2016 Thorlabs...

  • Page 66: Appendix

    ±0.1% f.s. (typ.) Drift (30 min., at constant the ambient temperature) Monitor Diode BIAS Voltage 0 to 10 V (adjustable) Laser Voltage Measurement Measurement principle 4-wire Measurement range 0 to 10 V Resolution 0.3 mV Accuracy ± 5 mV © 2016 Thorlabs...
  • Page 67 Module Width 1 Slot Operating Temperature Range 0 - 40 °C Storage Temperature Range -40 to 70 °C Output Connector D-Sub 9 Pin, Female D-Sub 15 Pin, Female ) Other ranges on request ) Depending on Thermistor Specification © 2016 Thorlabs...

  • Page 68: Certifications And Compliances

    TEC OUT ports. ITC8022 testing included a LAB8000 Laser Diode Mount Box attached at the other end of the CAB4x cable. Compliance demonstrated w ith the ITC8000 Series modules installed in the Thorlabs PRO8xxx Series Mainframes. Emissions, w hich exceed the levels required by these standards, may occur w hen this equipment is connected to a test object.

  • Page 69: Warranty

    For warranty repairs or service the unit must be sent back to Thorlabs. The customer will carry the shipping costs to Thorlabs, in case of warranty repairs Thorlabs will carry the shipping costs back to the customer.

  • Page 70: Copyright And Exclusion Of Reliability

    Thorlabs dealer or system installer. All rights reserved. This document may not be reproduced, transmitted or translated to another language, either as a whole or in parts, without the prior written permission of Thorlabs. Copyright © Thorlabs 2016. All rights reserved.

  • Page 71: Thorlabs 'End Of Life' Policy

    Waste treatment on your own responsibility If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site.

  • Page 72: List Of Acronyms

    Laser Diode Laser Diode Controller Light Emitting Diode Line Feed Local Lockout Laser Source Module Numeric Response data of type 1 Numeric Response data of type 2 Numeric Response data of type 3 Message AVailable Master Summary Status © 2016 Thorlabs...
  • Page 73 9 Appendix Over Temperature Protection Personal Computer Photo Diode ReQuest Service Message Selected Device Clear SELect Service Request Enable Register Service ReQuest STatus Byte Register Soft Ware ThermoElectric Cooler (Peltier Element) TRiGger © 2016 Thorlabs...

  • Page 74: Thorlabs Worldwide Contacts

    Email: europe@thorlabs.com Email: scandinavia@thorlabs.com France Brazil Thorlabs SAS Thorlabs Vendas de Fotônicos Ltda. 109, rue des Côtes Rua Riachuelo, 171 78600 Maisons-Laffitte São Carlos, SP 13560-110 France Brazil Tel: +33-970 444 844 Tel: +55-16-3413 7062 Fax: +33-811 38 17 48 Fax: +55-16-3413 7064 www.thorlabs.com...
  • Page 76 www.thorlabs.com...

This manual is also suitable for:

Pro800 seriesPro8000-4 seriesPro8000 series

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