THORLABS ITC4000 Series Operation Manual
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THORLABS ITC4000 Series Operation Manual

Laser diode current and temperature controller
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Laser Diode Current and
Temperature Controller
ITC4000 Series
Operation Manual
2018

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Summary of Contents for THORLABS ITC4000 Series

  • Page 1 Laser Diode Current and Temperature Controller ITC4000 Series Operation Manual 2018...
  • Page 2 Version: Date: 10-Jul-2018 Item No.: M0009-510-312 Copyright © 2018 Thorlabs...

  • Page 3: Table Of Contents

    1.3 Ordering Codes and Accessories 2 Getting Started 2.1 Preparation 2.2 Operating Elements 2.3 First Operation 2.4 System Preferences 3 Operating the ITC4000 Series 3.1 Connecting Components 3.1.1 Pin Assignment of the Laser Output Jack 3.1.2 Connecting the Laser Diode 3.1.3...
  • Page 4 ITC4000 Series Temperature Control 6.1.7 ITC4000 Series Common Specifications 6.2 Setup and Function of a Temperature Controller 6.3 PID Controller Theory 6.4 Menu Structure Overview 6.5 Factory Settings for Thorlabs ITC4000 controllers 6.6 Error messages 6.6.1 LED status messages 6.6.2 Status indicators 6.6.3...
  • Page 5 6.9 Exclusion of Reliability and Copyright 6.10 Thorlabs "End of Life" Policy (WEEE) 6.11 List of acronyms 6.12 Thorlabs Worldwide Contacts...

  • Page 6: Foreword

    Paragraphs preceded 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 this advice carefully! © 2018 Thorlabs...

  • Page 7: General Information

    1 General Information 1 General Information The ITC4000 Series is a high power precision laser diode and temperature controller series with a USB 2.0 interface for driving laser diodes up to 20A laser current. Special highlights of the ITC4000 Series Laser Diode and Temperature Controllers are: ·...

  • Page 8: Safety

    Thorlabs be used. Attention Prior to applying power to the ITC4000 Series, make sure that the protective conductor of the 3 conductor mains power cord is correctly connected to the protective earth ground contact of the socket outlet! Improper grounding can cause electric shock result-...
  • Page 9 Thorlabs (party responsible for compliance) could void the user’s authority to operate the equipment. Thorlabs GmbH is not responsible for any radio television interference caused by modi- fications of this equipment or the substitution or attachment of connecting cables and equipment other than those specified by Thorlabs GmbH.

  • Page 10: Protection Of Laser Diodes

    ITC4000 Series 1.2 Protection of Laser Diodes To protect the user and the connected setup, the ITC4000 Series includes the following protect- ive features: Key switch The key switch will shutoff the laser output. This feature complies with the CDRH (Center for Devices and Radiological Health) requirements and prevents an unauthorized usage of the laser driver.

  • Page 11: Ordering Codes And Accessories

    Shielded cable to connect the TEC output of the ITC4000 controller to a CAB4001 Thorlabs high power TEC mount or laser diode mount (male 17W2 mixed DSUB connector to male 17W2 mixed DSUB connector). The rated TEC cur- rent is 20A.

  • Page 12: Getting Started

    · With ITC4001, ITC4002QCL, ITC4005 or ITC4005QCL: 1 CAB4000 shielded cable to connect the TEC controller to a Thorlabs LM14S2, LDM21 or TCLDM9 laser diode mount (male 17W2 mixed DSUB connector to female 9 pin DSUB connector), rated TEC current ·...

  • Page 13: Operating Elements

    On/Off button for TEC output with TEC ON LED (green) and TEC ON ERROR LED (red) On/Off button for LD output with LD ON LED (green) and ERROR LD ON LED (red) Adjustment knob to change set values, push to enter © 2018 Thorlabs...
  • Page 14 ITC4000 Series Rear Panel LD ENABLE IN Laser Enable input (high to enable laser ON), TTL 5 V max. QCW PULSE IN Input for external trigger signal, TTL 5 V max. TRIGGER OUT QCW pulse tracking output, TTL 5 V OPT SENSOR IN Input for optical sensor, 0 ...

  • Page 15: First Operation

    ) and the mains fuses (see section Replacing the mains fuses The ITC4000 Series is immediately ready to use after turning on. The rated accuracy is reached, however, after a warming-up time of approx. 30 minutes. After switching on the unit, the graphics display will show the device status, followed by the measurement screen.
  • Page 16 ITC4000 Series Message Auto-Hide: Message and error conditions which force the Laser output to switch off may disappear after a short time. So it may be preferable to keep the error messages displayed. You can choose the following settings: Enabled (auto-hide): Error pop-up messages disappear after 10 seconds, you can close them instantly by pressing the ESC button (F5).

  • Page 17: Operating The Itc4000 Series

    20A current. For wiring of A1, A2, and A3 use only wires rated for at least 20A cur- rent. If Thorlabs laser diode mounts like TCLDM9, LDM21, or LM14S2 are used, the easiest way to connect them using a shielded cable CAB4005 (rated Laser current is 5A).

  • Page 18: Connecting The Laser Diode

    ITC4000 Series urement lines. The Laser current lines should be as short as possible and as close together as possible (e.g. twisted) to minimize inductance. 3.1.2 Connecting the Laser Diode For CG polarity connect the laser diode with anode to A3 and with cathode to A1 (ground). For AG polarity, connect the laser diode with cathode to A2 and with anode to A1 (ground).

  • Page 19: Connecting A Voltage Feedback Source

    3 Operating the ITC4000 Series Attention Input voltage / current must not exceed 10V / 20mA! 3.1.3.2 Connecting a voltage feedback source An optical voltage sensor (like thermopile) can be connected to the 13W3 DSUB jack "LASER OUTPUT" (R9) or to the BNC jack "OPT. SENSOR IN" (R4) at the rear panel (please refer to...

  • Page 20: Connecting Interlock And Ld On Monitoring

    ITC4000 Series 3.1.5 Connecting Interlock and LD ON Monitoring The interlock function is realized using two pins that must be connected to each other as a pre- condition for switching on the laser. These are pin 5 and pin 6 of the 13W3 DSUB "LASER OUTPUT"...

  • Page 21: Pin Assignment Of The Tec Output Jack

    Ground, otherwise the electronic circuit will be damaged! Attention The maximum TEC output current for the ITC4000 Series is 15A. Use only the specified connector type: 17W2 mixed DSUB plug with high power contacts A1 and A2 rated for at least 15A current.

  • Page 22: Connecting A Tec Element

    ITC4000 Series When using a custom-made cable, we recommend to use a shielded cable for the sensor in- puts with twisted pairs. Use a separate shielded cable for the TEC current and TEC voltage measurement lines. The TEC current lines should be as short as and as close as possible to minimize inductance.

  • Page 23: Connecting A Temperature Sensor

    3 Operating the ITC4000 Series 3.1.9 Connecting a Temperature Sensor The temperature controller in the ITC4000 can be used with the following temperature sensors: NTC thermistor, AD590, AD592, LM35, LM335, LM235, LM135, PT100, and PT1000. The setting and measurement range of thermistors is 100 Ω to 100 kΩ (Low range) and 1 kΩ to 1 MΩ...

  • Page 24: Current Temperature Sensors Ad590 Or Ad592

    ITC4000 Series A further way of approximating the relation between temperature and thermistor resistance is the method according to Steinhart-Hart, described by the formula with the Steinhart-Hart parameters A, B and C; T - temperature in K. To select the calculation...

  • Page 25: Setting Up The Tec Voltage Measurement

    (TEC ON mode). Note The ITC4000 Controllers don't support the “TEC lockout” feature of the Thorlabs laser diode mounts. These mounts usually have an on-board jumper to bypass the TEC lockout function. For details please refer to the operating manual of the laser diode mount.

  • Page 26: Ldc Control Outputs

    Tem- perature protection This jack can be used to monitor the temperature of a laser diode when using a Thorlabs LDC340 or LDC200C series laser driver. Simply connect the corresponding plug of the laser driver to this output of the ITC4000. The laser will be switched off if the laser temperature moves out of the temperature window.

  • Page 27: Power-Up

    3 Operating the ITC4000 Series 3.2 Power-up Warning Prior to switching on your ITC4000, please read the safety instructions in section Safety carefully. Turn on the unit by means of the line switch (F2, see section Operating elements at the front...

  • Page 28: Ld Output Configuration

    ITC4000 Series 3.3 LD Output Configuration In the Laser Output configuration you can set the polarity of the driven laser diode, the switch on delay time, the laser voltage protection and the inhibit input mode of the "LD Enable" input.

  • Page 29: Ld Source Setup

    3 Operating the ITC4000 Series Temp. Protection Mode: The temperature protection of the ITC4000 offers an internal temperature window monitoring by the integrated TEC module. You can choose between: None no action Output enable the laser Output is switched off during the temperature is out of the selected...
  • Page 30 ITC4000 Series 2.02 A (ITC4002QCL), from 5 mA to 5.05 A (ITC4005 and ITC4005QCL) and from 20 mA to 20.2 A (ITC4020). Setting the photodiode current limit: The feedback photo current will be limited to this preselected value, so the optical output power will be clipped by a hardware circuit.

  • Page 31: Ld Source Setpoints

    3 Operating the ITC4000 Series depth). With an oscilloscope connected to the ANALOG CTL OUT jack, the resulting waveform can be evaluated. Increasing the feedback loop speed as long as no overshoots are visible at the square wave, should result in an optimized setup. When using a thermopile sensor, a quite slow feedback loop speed may be necessary to obtain a stable constant power control.

  • Page 32: Setting The Power Feedback Source Parameters

    ITC4000 Series 3.6 Setting the Power Feedback Source Parameters To select the power feedback source please refer to section Setting the LD source paramet- . Additional settings according to the selected sensor are described in the following two sub items.
  • Page 33 3 Operating the ITC4000 Series The Input Route determines the used photodiode input. The Input Route will be the contacts 7 and 8 of the 13W3 Mixed DSUB jack "LASER OUTPUT" (R9) or the BNC jack "OPT SENSOR" (R4) on the rear panel. For using the 13W3 "LASER OUTPUT" please select DSUB connector.

  • Page 34: Thermopile Input

    ITC4000 Series 3.6.2 Thermopile Input For voltage sensors like thermopiles the following parameters can be set: Parameter Selection Description Input Route DSUB connector or Rear Panel configures which input connector is used Range 10mV, 100mV, 1V or 10V depending on nominal voltage of the used...

  • Page 35: Ld Modulation Settings

    3 Operating the ITC4000 Series 3.7 LD Modulation Settings The ITC4000 provides a modulated operation of laser diodes in constant current and constant power mode. The modulation signal can be generated internally or by an external source. An internal function generator offers an AC coupled sine, triangle or square signal. The modula-...
  • Page 36 ITC4000 Series modulation voltage at "MODULATION IN BNC" jack (R5) For example; you can add a bipolar (0...±5Vmax) modulation to an internal adjusted 50% cur- rent / power value or a unipolar modulation (0...10V) if the internal adjusted "DC" value is zero.

  • Page 37: Qcw Pulse Settings

    3 Operating the ITC4000 Series 3.8 QCW Pulse Settings The Quasi Continuous Wave (QCW) mode allows the laser output to be pulsed with an internal or an external trigger source. All necessary pulse parameters can be set in the QCW pulse set- tings menu.
  • Page 38 ITC4000 Series Pulse frequency / Pulse period This is the pulse repetition rate in case of internal triggering. Pulse frequency is the reciprocal value of the pulse period. If you change one value the other will be readjusted automatically. The pulse period can be changed from 1ms to 5s, the pulse frequency accordingly from 1 kHz to 0.2 Hz.

  • Page 39: Tec Source Setup

    3 Operating the ITC4000 Series 3.9 TEC Source Setup Setting the operating mode: In the TEC Source Setup menu, the temperature controller operating mode of your ITC4000 can be changed. It can be shifted between Current Source mode and Constant Temperature mode.

  • Page 40: Temperature Sensor Setup

    ITC4000 Series 3.10 Temperature Sensor Setup From the Main menu, select the Temperature Sensor Setup menu and press Enter or the ad- justment knob. Select Temperature Sensor by pressing Modify or the adjustment knob. The Temperature Sensor line is in entry mode, the border is flashing. By pressing Previous or...
  • Page 41 3 Operating the ITC4000 Series The set temperature for all sensors can be entered in Celsius, Kelvin or Fahrenheit. You can set your favored temperature unit in the System Preferences Menu (see section System prefer- ences The ITC4000 controllers offer an offset compensation for temperature sensors. The setting range is ±10 °C.

  • Page 42: Thermistor Settings

    ITC4000 Series 3.11 Thermistor Settings In Thermistor Settings menu, the parameters for a thermistor temperature calculation may be set, if a thermistor is used as temperature sensor. You can choose between two calculation methods, Exponential or Steinhart-Hart. The paramet- ers for the respective method can be set in the two additional menu items as shown below: For the Exponential Method, the required parameters are R0, T0 and β.

  • Page 43: Pid Control Loop

    3 Operating the ITC4000 Series 3.12 PID Control Loop Manual tuning: By setting the control loop parameters of the PID control loop manually, the temperature con- troller of the ITC4000 can be adapted to the most different thermal loads. Two different ways are possible to find the optimal parameters. A PID Auto-Tune function can...
  • Page 44 ITC4000 Series Note The settling behavior may be additionally observed at the DEVIATION OUT jack (R14, section Operating elements at the rear panel ) by means of an oscillo-scope (please refer to section TEC control outputs Switch on the TEC output with the switch " TEC ON" (F6, see section...
  • Page 45 3 Operating the ITC4000 Series Derivative (D) parameter: Change again repeatedly between temperature set points ±1...2°C around your desired target temperature while observing the settling behavior of the actual temperature. Increase the D parameter gradually by turning the adjustment knob (F8) clockwise.
  • Page 46 ITC4000 Series Higher values will accelerate the settling to the set temperature. Too high values will increase the amplitude and number of overshoots or will even make the system instable. The I parameter is set correctly when the actual temperature reaches the set temperature in a short time with a minimum of overshoots.

  • Page 47: Pid Auto Tune

    3 Operating the ITC4000 Series 3.13 PID Auto Tune A very simple method to adapt the PID parameters to the characteristics of your thermal setup is the use of the implemented PID Auto-Tune function. It is easy to use and gives good results after a relatively short time (depending on the time response of your thermal setup).
  • Page 48 ITC4000 Series If you do not like the system performance given by the PID Auto-Tune function, you can tune the parameters manually (see section PID control loop settings When you found the ideal PID parameters for your system, you can save them together with many other settings (e.g.

  • Page 49: Temperature Protection

    3 Operating the ITC4000 Series 3.14 Temperature Protection The temperature controller of the ITC4000 provides an adjustable Temperature Window to monitor the correct function of the temperature control. The display shows a “plus / minus“ value, so if you select i.e. 5 °C, the window will reach from 5 °C below the temperature set point to 5 °C above the temperature set point.

  • Page 50: Display Configuration

    ITC4000 Series 3.15 Display Configuration The display can be configured to show two, four or six values on the screen. Factory setting is the six value screen. You can select your favored measurement screen by pressing the Display button or in the Dis- play Configuration menu.
  • Page 51 3 Operating the ITC4000 Series · Thermopile Voltage Reading · Optical Power Reading via Thermopile · Temperature Reading · Temperature Deviation Reading · Temperature Sensor Signal Reading · TEC Current Reading · TEC Voltage Reading · TEC Power Reading For choosing the desired values please select the appropriate line by turning the adjustment knob.

  • Page 52: Settings Memory

    At the positions 1 … 3, the parameters (for a temperature set point of about 25°C) are pre- saved for the Thorlabs laser mounts. The parameter sets # 4…8 can be used to save your per- sonal setups. If more space is required, and you don't need the pre-saved parameter sets # 1…...
  • Page 53 3 Operating the ITC4000 Series Via Recall Memory Settings you can load a saved laser setup. Note that this will overwrite your currently used instrument settings. Before recalling data from the memory, the laser and TEC outputs must be switched off (if on)

  • Page 54: Digital I/O Ports

    ITC4000 Series 3.17 Digital I/O Ports The laser diode controllers of the ITC4000 Series have a very versatile digital port providing four separately configurable Input / Output lines. This feature allows control of external circuitry from the unit, or control of the unit from external circuitry (via PC software). Figure 58 shows the...
  • Page 55 3 Operating the ITC4000 Series I/O port source operation In above circuit, the output drives an optocoupler in source operation. This component may be replaced by a LED or a switching transistor. To switch the connected device to on-state, the output level of the digital I/O line must be set HIGH.
  • Page 56 For enhanced controlling, please use the remote control interface from an external PC or Laptop. See the Thorlabs “Series 4000 Programmers Reference Manual” on the included “Ser- ies 4000 Instrumentation CD”.

  • Page 57: Systems Preferences

    3 Operating the ITC4000 Series 3.18 Systems Preferences The System Preferences menu allows to select different settings concerning your ITC4000 sys- tem configuration, including Message Handling, Display Brightness, Display Contrast, Sound Signals, and Update Capability. For detailed explanations please see section Getting Started - System Preferences 3.19 Remote Control...

  • Page 58: Computer Interface

    Via the instrument's USB interface you may easily connect to third party data logging, data ac- quisition and data analysis software (e.g. MATLAB, NI LabVIEW Signal Express, Agilent VEE). For basic instrument communication you may also use the Thorlabs Instrument Communicator 2 Software from the accompanying data carrier. Please see also the SCPI Programmers Refer- ence Manual for a detailed description of the instrument's command set.

  • Page 59: Firmware Update

    Firmware upgrades can be accomplished by the user via the USB interface using the software "Thorlabs DFU Wizard". Note To install the Thorlabs DFU wizard successfully, you must have Administrator privileges on the PC, and the instrument must be powered down or disconnected from the USB. Follow the instructions below to upgrade your instrument: ·...
  • Page 60 ITC4000 Series Note Do not switch off the instrument or disconnect the USB cable during the firmware download. © 2018 Thorlabs...

  • Page 61: Maintenance And Repair

    5.2 Line voltage settings The ITC4000 Series controllers operate with line voltages of 100 ... 120 V AC and 200 ... 240 V AC ±10%. The line frequency range is 50 ... 60 Hz. Thus it can be operated worldwide without any adjustment or voltage setting.
  • Page 62 3. Replace the defective fuses (R15). We recommend changing both fuses, even if only one fuse has opened. Press in the fuse holder into the mains jack until locked on both sides. 4. Switch on the unit. If it cannot be switched on, please contact your supplier or Thorlabs. © 2018 Thorlabs...

  • Page 63: Troubleshooting

    Please check the bandwidth for the constant power feedback loop in section Setting the LD source parameters Ø The temperature in constant temperature mode is oscillating. · Please check the PID settings in section PID control loop settings © 2018 Thorlabs...
  • Page 64 ITC4000 Series If you don't find the error source with the help of the troubleshooting list, please contact the Thorlabs (see Thorlabs Worldwide Contacts before sending the unit to Thorlabs for checkup and repair. · Please check the error messages before calling.

  • Page 65: Appendix

    ±(0.1% reading + 10 µV / + 100 µV / + 1 mV / + 5 mV) Voltage Input Impedance Laser Power Control (Constant Power Mode) Photo Current Setting Resolution, Control Range 0 to 2 mA 1 µA 32 nA Control Range 0 to 20 mA 10 µA 320 nA © 2018 Thorlabs...
  • Page 66 ITC4000 Series ITC4001 Front Panel Remote Control Thermopile Voltage Setting Resolution, Control Range 1 µV to 10 mV 1 µV 0.16 µV Control Range 10 µV to 100 mV 10 µV 1.6 µV Control Range 100 µV to 1 V 100 µV...
  • Page 67 TTL or 5 V CMOS (open collector with internal pull-up Output Level resistor 2 k Dead Time To next Pulse >10 µs depending on selected measurement range All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing). © 2018 Thorlabs...

  • Page 68: Itc4002Qcl Laser Control

    ITC4000 Series 6.1.2 ITC4002QCL Laser Control ITC4002QCL Front Panel Remote Control Current Control (Constant Current Mode) Laser Diode Current Range 0 to 2 A Compliance Voltage 17 V Setting Resolution 100 µA 32 µA Measurement Resolution 100 µA 32 µA Current accuracy ±(0.1 % reading + 0.8 mA)
  • Page 69 20 Hz to 130 kHz Modulation Depth 0.1 to 100% QCW Mode Pulse Width Range 100 µs to 1 s Pulse Width Resolution 1 µs Repetition Rate Range 1 ms to 5 s ( 0.2 to 1000 Hz) © 2018 Thorlabs...
  • Page 70 ITC4000 Series ITC4002QCL Front Panel Remote Control Repetition Rate Resolution 10 µs Trigger rising edge triggered, starts QCW pulse with internally Input adjusted width Input Level TTL or 5 V CMOS Output active high, tracks pulse width TTL or 5 V CMOS (open collector with internal pull-up...

  • Page 71: Itc4005 Laser Control

    1 µV 0.16 µV Control Range 10 µV to 100 mV 10 µV 1.6 µV Control Range 100 µV to 1 V 100 µV 16 µV Control Range 1 mV to 10 V 1 mV 0.16 mV © 2018 Thorlabs...
  • Page 72 ITC4000 Series ITC4005 Front Panel Remote Control Power Limit (Constant Power Mode) Photo Current Limit Setting Ranges 5 µA to 2 mA / 50 µA to 20 mA Photo Current Limit Resolution Control Range 0 to 2 mA 1 µA...
  • Page 73 TTL or 5 V CMOS (open collector with internal pull-up res- Output Level istor 2 k Dead Time to Next Pulse >10 µs depending on selected measurement range All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing). © 2018 Thorlabs...

  • Page 74: Itc4005Qcl Laser Control

    ITC4000 Series 6.1.4 ITC4005QCL Laser Control ITC4005QCL Front Panel Remote Control Laser Current Control (Constant Current Mode) Laser Diode Current Range 0 to 5 A Compliance Voltage 20 V Setting Resolution 1 mA 80 µA Measurement Resolution 1 mA 80 µA Current Accuracy ±(0.1 % reading + 2 mA)
  • Page 75 1 mV/V / 10 mV/V / 100 mV/V / 1V/V ±5% Internal Laser Modulation Waveforms Sine, Square, Triangle Frequency Range 20 Hz to 100 kHz Modulation Depth 0.1 to 100% QCW Mode Pulse Width Range 0.1 ms to 1 s © 2018 Thorlabs...
  • Page 76 ITC4000 Series ITC4005QCL Front Panel Remote Control Pulse Width Resolution 1 µs Repetition Rate Range 1 ms to 5 s ( 0.2 to 1000 Hz) Repetition Rate Resolution 10 µs Trigger rising edge triggered, starts QCW pulse with internal adjus-...

  • Page 77: Itc4020 Laser Control

    1 µV 0.16 µV Control Range 10 µV to 100 mV 10 µV 1.6 µV Control Range 100 µV to 1 V 100 µV 16 µV Control Range 1 mV to 10 V 1 mV 0.16 mV © 2018 Thorlabs...
  • Page 78 ITC4000 Series ITC4020 Front Panel Remote Control Power Limit (Constant Power Mode) Photo Current Limit Setting Ranges 5 µA to 2 mA / 50 µA to 20 mA Photo Current Limit Resolution Control Range 0 to 2 mA 1 µA...
  • Page 79 TTL or 5 V CMOS (open collector with internal pull-up res- Output Level istor 2 k Dead Time to Next Pulse >10 µs depending on selected measurement range All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing). © 2018 Thorlabs...

  • Page 80: Itc4000 Series Temperature Control

    ITC4000 Series 6.1.6 ITC4000 Series Temperature Control ITC4002QCL / 4005 / 4005QCL / ITC4001 4020 Front Panel Remote Control Front Panel Remote Control TEC Current Control Current Range -8 to +8 A -15 to +15 A Compliance Voltage >12 V >15 V...
  • Page 81 40 mV Accuracy (4-wire) ± 50 mV depending on selected measurement range control range and thermal stability dependent on thermistor parameters All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing). © 2018 Thorlabs...

  • Page 82: Itc4000 Series Common Specifications

    ITC4000 Series 6.1.7 ITC4000 Series Common Specifications Digital I/O port Number of I/O Lines 4 (separately configurable) Input Level TTL or CMOS, voltage-tolerant to max.24 V Output Level (Source Operation) TTL or 5 V CMOS, 2 mA max. Output Level (Sink Operation) open collector, up to 24 V, 400 mA max.
  • Page 83 Dimensions (WxHxD) without Operating Elements 263 x 122 x 307 mm³ Dimensions (WxHxD) with Operating Elements 263 x 122 x 345 mm³ All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing). © 2018 Thorlabs...

  • Page 84: Setup And Function Of A Temperature Controller

    ITC4000 Series 6.2 Setup and Function of a Temperature Controller When devices are tempered normally, the following components are involved: · The component to be tempered (i.e. a laser diode) · A sensor measuring the temperature of the component ·...
  • Page 85 Furthermore the temperature slope in the heat sink must form anew. The sensor (which also possesses a significant heat capacity) must settle to the laser tempera- ture. Possible solution: PID controller adjustment © 2018 Thorlabs...

  • Page 86: Pid Controller Theory

    ITC4000 Series 6.3 PID Controller Theory The temperature controller in the ITC4000 Series is using a digital proportional-integral-derivat- ive controller (PID controller) to correct the difference between a measured temperature and a desired temperature set point. The temperature can be adjusted accordingly by calculating and then outputting a corrective current.

  • Page 87: Menu Structure Overview

    I/Os can be read or Digital I/O Port written the system settings like message handling, display brightness System Preferences and contrast, sound signal on/off, line frequency and update capability can be changed. © 2018 Thorlabs...
  • Page 88 ITC4000 Series Menu topic description contains the address string for use of VISA remote control Remote Control contains device specific information like device name, serial Information number, calibration date, and the current firmware version © 2018 Thorlabs...

  • Page 89: Factory Settings For Thorlabs Itc4000 Controllers

    6 Appendix 6.5 Factory Settings for Thorlabs ITC4000 controllers Set Value Factory Setting LD Polarity cathode grounded (CG) Switch On Delay 3 seconds LD Voltage Protection 1.0 V Inhibit Mode Protection Temperature Protection Mode None Noise Reduction Filter Disabled Laser Current Limit...
  • Page 90 ITC4000 Series Set Value Factory Setting QCW Pulse Period 20 ms QCW Pulse Width 1 ms TEC Operating Mode Constant Temperature TEC Current Limit 0.1 A set point Low Limit -150 °C set point High Limit +150 °C Temperature set point +25 °C...
  • Page 91 6 Appendix Set Value Factory Setting Line Frequency Auto Update Capability Disabled © 2018 Thorlabs...

  • Page 92: Error Messages

    ITC4000 Series 6.6 Error messages 6.6.1 LED status messages LD ON switch LED Description Green LD output ON · Switch On Delay active Green flashing · I-Limit / P-Limit · Inhibit Input Mode (Output Enable) active* · Temp. Protection Mode (Output Enable) active* Critical errors: ·...

  • Page 93: Status Indicators

    T PROT The current TEC temperature is outside the preselected temperature window and the temperature protection is active. The effect on the laser output is depending on the Temp. protection mode setting in the Output configuration menu. © 2018 Thorlabs...

  • Page 94: Instrument Errors

    ITC4000 Series 6.6.3 Instrument errors Switch Off / Output Protection Errors Error Description The instrument is too hot The laser output and the TEC output were switched off because the instrument is internally overheated LD output switched off due to Key...
  • Page 95 The TEC setup is not connected to the unit correctly Value is out of range A sent numerical value in remote mode is out of range, check the allowed min/max values for the parameter to be changed © 2018 Thorlabs...
  • Page 96 FPGA configuration error A FPGA configuration failure has occurred during the boot procedure, please switch the unit off and on again. If this error is shown again contact the Thorlabs Hotline Nonvolatile checksum error A general EEPROM checksum error has occured, please switch the unit off and on again.

  • Page 97: Certifications And Compliances

    6 Appendix 6.7 Certifications and Compliances This product was tested for and complies with the following standards: · CAN/CSA-C22.2 No. 61010-1-04 · ANSI/UL 61010-1-2004 © 2018 Thorlabs...

  • Page 98: 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 99 6 Appendix 6.9 Exclusion of Reliability and Copyright Thorlabs has taken every possible care in preparing this document. We however assume no li- ability for the content, completeness or quality of the information contained therein. The content of this document is regularly updated and adapted to reflect the current status of the hardware and/or software.
  • Page 100 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 101 I (current) Photodiode Laser Diode Laser Diode Controller Light Emitting Diode Negative Temperature Coefficient Overtemperature Personal Computer Photodiode Quasi Continuous Wave Radio Frequency Root Mean Square Thermo Electric Cooler Thermo Electric Driver Universal Serial Bus U (voltage) Thermopile © 2018 Thorlabs...
  • Page 102 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: +33-825 744 800 Fax: +55-16-3413 7064 www.thorlabs.com...
  • Page 103 Display Configuration duration Open circuit detection operating mode Error optical power limit Error messages optical voltage sensor 21, 40 Exponential Method photodiode Factory settings photodiode current limit feedback inputs photodiode input firmware 45, 84 Firmware upgrades PID Auto-Tune © 2018 Thorlabs...
  • Page 104 ITC4000 Series PID controller Platinum RTD sensor Polarity voltage protection PT100 22, 38 PT1000 pulse frequency window protection pulse repetition rate pulse width QCW Mode QCW pulse trigger source Recall Memory Settings Save Current Settings To Memory semicolon Settings Memories...
  • Page 105 www.thorlabs.com...

This manual is also suitable for:

Itc4001Itc4002qclItc4005Itc4005qclItc4020

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