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Newport 6100 User Manual

Laser diode and temperature controller
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Model 6100
Laser Diode and Temperature Controller
User's Manual

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Summary of Contents for Newport 6100

  • Page 1 Model 6100 Laser Diode and Temperature Controller User’s Manual...
  • Page 2 Preface...
  • Page 3 We declare that the accompanying product, identified with the mark, complies with requirements of the Electromagnetic Compatibility Directive, 2004/108/EC and the Low Voltage Directive 2006/95/EC. Model Number: 6100 Year mark affixed: 2013 Type of Equipment: Electrical equipment for measurement, control and laboratory use in industrial locations.

  • Page 4: Warranty

    INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS. First printing 2009 © 2018 by Newport Corporation, Irvine, CA. All rights reserved. No part of this manual may be reproduced or copied without the prior written approval of Newport Corporation.
  • Page 5 Preservation of Secrecy and Confidentiality and Restrictions to Access: Customer shall protect the Newport Programs and Related Materials as trade secrets of Newport, and shall devote its best efforts to ensure that all its personnel protect the Newport Programs as trade secrets of Newport Corporation.

  • Page 6: Technical Support Contacts

    Newport Corporation, freight prepaid, clearly marked with the RMA# and we will either repair or replace it at our discretion. Newport is not responsible for damage occurring in transit and is not obligated to accept products returned without an RMA#.

  • Page 7: Table Of Contents

    Preface Table of Contents EU Declaration of Conformity .............. iii Warranty ....................iv Technical Support Contacts ..............vi Table of Contents ................. vii List of Figures ..................xi List of Tables ..................xii Safety Precautions Definitions and Symbols ............13 1.1.1 General Warning or Caution ...........13 1.1.2 Electric Shock ..............13 1.1.3 European Union CE Mark ..........14...
  • Page 8 viii Preface 2.4.3 General Subsystem ............29 Getting Started Unpacking and Handling ............31 Inspection for Damage ............... 31 Parts List ..................32 Choosing and Preparing a Suitable Work Surface ..... 32 Electrical Requirements .............. 32 Power Supplies ................33 System Operation General Features .................
  • Page 9 Preface 4.4.9 Setup Screens ..............49 Rear Panel ................... 62 4.5.1 USB Interface ..............63 4.5.2 Chassis GND ..............63 4.5.3 AC Power Cord ...............63 4.5.4 Fuses ................63 4.5.5 TEC Output Connector ............64 4.5.6 Laser Diode Output Connector ........65 4.5.7 I/O Signals Connector .............66 Signals I/O ..................
  • Page 10 Preface 6.3.3 RTD Sensors ..............127 Laser Diode Driver Operation ..........128 6.4.1 Operating Modes ............128 6.4.2 Control Modes ...............129 TTL Output Modes ..............130 6.5.1 LOW TTL Mode ............130 6.5.2 HIGH TTL Mode ............130 6.5.3 ENABLE OUTPUT MONITOR TTL Mode ....130 6.5.4 PULSE MONITOR TTL Mode ........131 6.5.5 TTL INPUT MONITOR TTL Mode ......131 LIV Characterization ..............

  • Page 11: List Of Figures

    Figure 18 A Sample TEC Params Measurement Screen ......... 47 Figure 19 A Sample LIV Params Measurement Screen ........48 Figure 20 Model 6100 Menu Structure ............51 Figure 21 A Sample Set LDD Params Sub-menu ..........51 Figure 22 A Sample Set TEC Params Sub-menu ..........55 Figure 23 A Sample Set Limits Sub-menu ............
  • Page 12 Preface List of Tables Table 1 Voltage Selector Switch Settings and Fuse Ratings ......33 Table 2 Laser Diode Error and Limit LED Status Definition ...... 41 Table 3 TEC Error and Limit LED Status Definition ........42 Table 4 TEC Connector Pin-out ..............

  • Page 13: Safety Precautions

    Safety Precautions Definitions and Symbols The following terms and symbols are used in this documentation and also appear on the Model 6100 Laser Diode and Temperature Controller where safety-related issues occur. 1.1.1 General Warning or Caution Figure 1 General Warning or Caution Symbol The Exclamation Symbol in the figure above appears on the product and in Warning and Caution tables throughout this document.

  • Page 14: European Union Ce Mark

    1.1.3 European Union CE Mark Figure 3 CE Mark The presence of the CE Mark on Newport Corporation equipment means that this instrument has been designed, tested and certified compliant to all applicable European Union (CE) regulations and recommendations. 1.1.4...

  • Page 15: Fuses

    Safety Precautions 1.1.7 Fuses Figure 7 Fuse Symbol The symbol in the figure above identifies the fuse location on the Model 6100 Laser Diode and Temperature Controller. 1.1.8 Figure 8 USB Symbol The symbol in the figure above identifies the USB connector location on the Model 6100 Laser Diode and Temperature Controller.

  • Page 16: Control Of Hazardous Substances

    For information about where the user can drop off the waste equipment for recycling, please contact your local Newport Corporation representative. 1.1.11 Control of Hazardous Substances...

  • Page 17: General Cautions

     This product should only be powered as described in the manual.  There are no user-serviceable parts inside the Model 6100 Laser Diode and Temperature Controller .  Adhere to good laser safety practices when using this equipment.

  • Page 18: Summary Of Warnings And Cautions

    Temperature Controller, the AC power cord must be disconnected from the wall socket. CAUTION There are no user serviceable parts inside the Model 6100 Laser Diode and Temperature Controller. Work performed by persons not authorized by Newport Corporation will void the warranty.

  • Page 19: Location Of Labels And Warnings

    Safety Precautions WARNING While the Model 6100’s front panel key switch turns power OFF to the internal electronics, is should not be depended upon to fully disconnect the unit from MAINS power. Disconnect the power cord to fully isolate the Model 6100 from MAINS power.
  • Page 20 Safety Precautions This page is intentionally left blank...

  • Page 21: General Information

    A wide range of Laser Diode Driver and TEC temperature control device and user safety features were incorporated into the design of this instrument. The Model 6100 Laser Diode and Temperature Controller complies with applicable CE and CDRH requirements.

  • Page 22: Temperature Controller Subsystem

    Support for Remote Data Collection All control and measurement functions are accessible via the USB interface. As your instrumentation needs change, the Model 6100 Laser Diode and Temperature Controller will adapt to all your new applications giving you the ultimate in flexible laboratory equipment.

  • Page 23: Input Power

    General Information Input Power The Model 6100 can be configured to operate on 100, 120, 220, or 240 volt AC power. See Section 3.6 for information on how to configure the Model 6100 for operation on your country-specific AC voltage.

  • Page 24: Specifications

    General Information Specifications 2.4.1 Laser Diode Driver Output Connector Output Current Range 0 to 500mA 0 to 1500mA Resolution 7.6 µA 23 µA Accuracy (% of FS) ±0.05% ±0.05% Short-Term Stability (1 hour) <50 ppm of FS <200 ppm of FS Long-Term Stability (24 hours) <150 ppm of FS <300 ppm of FS...
  • Page 25 General Information Photodiode Feedback Type Differential Differential Range 0 to 5 mA 0 to 5 mA Reverse Bias Adjustable, 0 to 5V Adjustable, 0 to 5V Output Stability 0.1µA 0.1µA Setpoint Accuracy (% of FS) ±0.05% ±0.05% External Analog Modulation Input -10 to +10V -10 to +10V...
  • Page 26 General Information Accuracy (% of FS) ±0.2% ±0.2% Photodiode Current Range 0 to 5000µA 0 to 5000µA Resolution 0.01µA 0.01µA Accuracy (% of FS) ±0.05% ±0.05% Photodiode Responsivity 0.00 to 0.00 to Range 999.999µA/mW 999.999µA/mW Resolution 0.001µA/mW 0.001µA/mW Optical Power Range 0.00 to 500.00mW 0.0 to 5000.0mW...

  • Page 27: Temperature Controller

    General Information 2.4.2 Temperature Controller Model 6100 Output Connector DB15 Maximum Output Power Output Current Type Bipolar, Constant Current Source Range –4 to + 4A Resolution (manual / remote) 1 mA / 0.1 mA Accuracy ±4 mA Noise/Ripple (rms) <0.5 mA...
  • Page 28 General Information Display Resolution Temperature 0.001ºC Resistance at 10 µA 0.01kΩ Resistance at 100 µA 0.001kΩ Resistance at 1 mA 0.0001kΩ Resistance at 10 mA 0.0001kΩ Resistance RTD 0.001Ω LM335 0.1 mV AD590 0.01 µA TE Current 1 mA TE Voltage 1 mV Display Accuracy Temperature...

  • Page 29: General Subsystem

    General Information 2.4.3 General Subsystem Environmental Specifications Voltage Requirements 100/120/220/240 VAC, 50/60Hz Power Requirements MAX POWER = 140W Chassis Ground 4 mm banana jack Size (H x W x D) [in. (mm)] 3.47 (88.14) x 19.00 (482.60) x 12.24 (310.89) Mainframe Weight [lb (kg)] 11.2 (5.1) Operating Temperature...
  • Page 30 General Information This page is intentionally left blank...

  • Page 31: Getting Started

    Getting Started Unpacking and Handling It is recommended that the Model 6100 Laser Diode and Temperature Controller be unpacked in a lab environment or work site. Unpack the system carefully; small parts are included with the instrument. Inspect the box carefully for loose parts. You are urged to save the packaging material in case you need to ship your equipment in the future.

  • Page 32: Parts List

    Getting Started Parts List The following is a list of parts included with the Model 6100 Laser Diode and Temperature Controller: 1. Start Up Guide (Hardcopy). 2. CD with Software Drivers and Utilities, User’s Manual, Start Up Guide. 3. IEC320 AC line cord with a NEMA 5-15P, or country-specific, connector.

  • Page 33: Power Supplies

    Prior to plugging in the AC line cord, the user MUST configure the Model 6100 for operation on the available AC power. This is accomplished by setting the voltage selector switch on the AC power entry module AND verifying that the correct fuses are installed into the power entry module.
  • Page 34 Getting Started WARNING To avoid electric shock, connect the instrument to properly earth-grounded receptacles only. Failure to observe these precautions can result in fire, severe injury or death. WARNING To avoid electric shock, the appropriate fuses for the AC input power voltage must be installed in the instrument.

  • Page 35: System Operation

     Ability to turn OFF current to a LD if a fault is detected with its associated TEC. 4.1.1 Laser Diode Driver Features The Laser Diode Driver subsystem of the Model 6100 can be operated in one of the following modes:  Constant Laser Diode Current  Constant Photodiode Current...

  • Page 36: Temperature Controller Features

    “Ild” variable. The LDD uses a control loop comparing the Model 6100’s internal current sense to the current set point, raising or lowering the amount of current to reach and maintain that set point.

  • Page 37: Safety Features

    This mode holds the TEC at a constant temperature based on feedback from the sensor in the TEC mount. In this mode, the 6100 uses a control loop comparing the sensor input to the temperature set point (Ts), driving the Ite current positive or negative to reach and maintain that set point.

  • Page 38: Conditions Which Will Automatically Shut Off The Laser Diode Output

    4.2.3 Power Line Surge Protection The Model 6100 unit contains circuitry to minimize the impact of power line surges. In order to further protect an attached laser diodes and TEC coolers, the 6100 contains circuitry to immediately shut down one or both of the outputs when a large surge is detected.

  • Page 39: Front Panel

    Key Switch The controller’s main electrical power ON / OFF switch is located on the bottom left-hand corner of the front panel. With the 6100 connected to an AC power source, the instrument electrical power is completely turned-OFF when the key switch is in the “0” position. Conversely, the unit’s electrical power is turned-ON when the key switch is in the “I”...

  • Page 40: Laser Diode Output On Switch And Indicator

    System Operation The beeper is turned ON, if enabled, briefly. The 6100 has a key switch for this function, rather than a conventional push button or rocker switch, to meet the CDRH laser safety key switch lockout requirements. 4.3.2 LASER DIODE OUTPUT ON Switch and Indicator The switch will activate the ON LED and allow current flow to the laser diode after an approximately 3 second delay.

  • Page 41: Laser Diode Display Section

    4.3.5 LASER DIODE Display Section The lower-left quadrant of the Model 6100 front panel has a 5 digit green LED array. The table below shows the displayed value and the state of units LEDs based on the LDD mode of operation.

  • Page 42: Tec Limit Indicator Led

    4.3.10 TEC DISPLAY Section The lower-right quadrant of the Model 6100 front panel has a 5 digit green LED array. The table below shows the displayed value and the state of units LEDs based on the TEC mode of operation.

  • Page 43: Menu Section

    In addition to displaying status parameters on the two 5-segment LED displays(bottom sections) of the instrument, the Menu (top section) section of the Model 6100 front panel enables users to view/change many more parameters including feedback sensor type, PID values, and Steinhart-Hart or Callendar –...

  • Page 44: Cursor Arrow Keys

    4.4.5 Display Elements The Model 6100 uses a character display to depict information about the current state of the system. The display screens shown by the instrument can be classified as follows: title screen, measurement screen, setup screen and error message screen.

  • Page 45: Title Screen

    The title screen is displayed for a few seconds every time the instrument is powered ON. This screen is used to display the present firmware version of the instrument. A sample title screen is shown in Figure 15. Newport Corp. 6100 – Laser Diode and Temp.Controller Ver. 1.0.1.0 Firmware version...

  • Page 46: Figure 17 A Sample Ldd Params Measurement Screen

    System Operation LDD Parameters: LDD Mode Parameter 1 Parameter 2 Constant LD Current Laser Diode Current Actual Photodiode Setpoint (Ild) Current (Im) Constant PD Current Photodiode Current Actual Laser Diode Setpoint (Ipd) Current (Io) Contant PD Power Photodiode Power Actual Laser Diode Setpoint (Ppd) Current (Io) TEC Parameters:...

  • Page 47: Figure 18 A Sample Tec Params Measurement Screen

    System Operation LDD Mode Parameter 1 Parameter 3 Constant LD Current Laser Diode Current Actual Photodiode Setpoint (Ild) Current (Im) Constant PD Current Photodiode Current Actual Laser Diode Setpoint (Ipd) Current (Io) Constant PD Power Photodiode Power Actual Laser Diode Setpoint (Ppd) Current (Io) Users can modify the setpoints for LDD only from this screen.

  • Page 48: Figure 19 A Sample Liv Params Measurement Screen

    System Operation TEC Mode Parameter 1 Parameter 3 Constant Current Output Current Actual Temperature (T) Setpoint (Is) Constant Resistance/Reference Actual Output Current Resistance/Reference Setpoint (Rs) (Ite) Contant Temperature Temperature Setpoint Actual Output Current (Ts) (Ite) Users can modify the setpoints for TEC only from this screen. A diamond symbol ( ) to the left of the setpoint variable indicates the “selected”...

  • Page 49: Setup Screens

    System Operation LDD Mode Parameter 1 Parameter 2 Constant LD Current Laser Diode Current Actual Photodiode Setpoint (Ild) Current (Im) Constant PD Current Photodiode Current Actual Laser Diode Setpoint (Ipd) Current (Io) Contant PD Power Photodiode Power Actual Laser Diode Setpoint (Ppd) Current (Io) The third and fourth parameters displayed on this screen are: LD Forward...
  • Page 50 System Operation Setup/Enter Set LDD Params Set Limits Lim Io Lim Im Lim Po Vcomp Mode Range Bandwidth Modulation Set PD Constants PD Responsivity Get/Clr PD Zero PD Zero Apply Zero Link LDD/TEC Set TEC Params Set Limits Lim Ite Lim Vte Lim Tlo (Rlo) Lim Thi (Rhi)

  • Page 51: Figure 20 Model 6100 Menu Structure

    LDD Params TEC Params LIV Params Figure 20 Model 6100 Menu Structure 4.4.9.1 Set LDD Params Menu The Set LDD Params Menu is used to change parameters related to LDD operation. These parameters, as shown in the menu structure above, are: safety limits, mode of operation, current range, bandwidth, modulation state and photodiode responsivity.
  • Page 52 System Operation Set Limits Menu The Set Limits menu item is used to change the limit settings—LD Current, PD Current, PD Power and Compliance Voltage limits. To set the desired limits, use the UP and DOWN arrow keys to select this menu item.
  • Page 53 Modulation Menu WARNING When using the current modulation feature, ensure that the modulation signal source is disabled before enabling the 6100 laser current output. Turning on the laser current output when the modulation is enabled can cause current transients that can damage laser diodes.
  • Page 54 System Operation state and press SETUP/ENTER key to accept the new modulation state. The new modulation state will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes. Set PD Constants Menu The Set PD Constants menu item is used to change the photodiode related settings—PD Responsivity, Zero the PD Current reading by either capturing the present PD Current measurement or by entering a desired value, Set a flag...

  • Page 55: Figure 22 A Sample Set Tec Params Sub-Menu

    System Operation 4.4.9.2 Set TEC Params Menu The Set TEC Params Menu is used to change parameters related to TEC operation. These parameters, as shown in the menu structure above, are: safety limits, mode of operation, feedback sensor type, PID control loop gains, and feedback sensor constants.

  • Page 56: Figure 23 A Sample Set Limits Sub-Menu

    System Operation Figure 23 A Sample Set Limits Sub-menu Mode Menu The Mode menu item is used to change the instrument’s TEC mode of operation. To set the desired mode of operation, use the UP and DOWN arrow keys to select this menu item.

  • Page 57: Figure 24 A Sample Set Pid Gains Sub-Menu

    System Operation Figure 24 A Sample Set PID Gains Sub-menu To select a preset PID gains bin, use the UP and DOWN arrow keys to select Preset sub-menu item. By default, this item will be in idle state and the present Preset bin number value will be displayed.

  • Page 58: Figure 26 A Sample Sensor Constants Sub-Menu

    System Operation the description of TEC:CONST command for further details on these constants. To modify these constants, use the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for setting the sensor constants is shown in figure below.

  • Page 59: Figure 27 A Sample System Parameters Sub-Menu

    System Operation Figure 27 A Sample System Parameters Sub-menu Use the UP and DOWN arrow keys to select the parameter that needs to be modified. Once the desired item has been selected, press the SETUP/ENTER key to change the item’s state from idle to active. Once the item is in active state, use the cursor keys to specify a desired value.

  • Page 60: Figure 29 A Sample Save Parameters Sub-Menu

    System Operation Now, use the DOWN arrow key to select the menu item that states “Press Enter to Save”. Press SETUP/ENTER key with this menu item selected to save the system settings to the bin number selected earlier. The instrument will automatically return to the Measurement screen once the saving process has completed.

  • Page 61: Figure 30 A Sample Measurement Screen Sub-Menu

    System Operation LDD and TEC Params  LDD Params TEC Params LIV Params Figure 30 A Sample Measurement Screen Sub-menu Use the UP and DOWN arrow keys to select the desired measurement screen. Once the desired item has been selected, press the SETUP/ENTER key to accept the new selection.

  • Page 62: Rear Panel

    USB communication interface. Rear Panel The Model 6100 rear panel has a TEC OUTPUT connector, a LASER DIODE OUTPUT connector, SIGNALS I/O connector, a USB connector, a MODULATION INPUT connector, a PHOTODIODE INPUT, a Photodiode...

  • Page 63: Usb Interface

    4.5.3 AC Power Cord The Model 6100 can be operated on either 50 or 60 Hz mains power. The instrument can be configured for operation at the following nominal AC line voltages -- 100, 120, 220, 230, or 240 VAC. See section 3.6 for information on properly configuring the Model 6100 for the available mains power.

  • Page 64: Tec Output Connector

    Failure to do so may result in the unit malfunction or/and damage. Be careful when connecting other instruments to 6100 Laser Diode and Temperature Controller, as they may have their ground connected to the Earth Ground.

  • Page 65: Laser Diode Output Connector

    Failure to do so may result in the unit malfunction or/and damage. Be careful when connecting other instruments to 6100 Laser Diode and Temperature Controller, as they may have their ground connected to the Earth Ground.

  • Page 66: I/O Signals Connector

    System Operation 4.5.7 I/O Signals Connector This female 25 pin D-connector provides access to various analog and digital input/output signals. The signal pin assignments for this connector are shown in Table 6, below. Detailed information on these signals is provided in Section 4.6.

  • Page 67: Signals I/O

    Laser Diode Analog Ground, and the Temperature Controller Analog Ground. The Laser Diode Analog Ground, Temperature Controller Analog Ground, and the Digital Ground are isolated from each other within the Model 6100. The Chassis Ground is also isolated from the other three grounds. The Chassis Ground and Digital Ground are available to the user on the back panel DB-25 female connector.

  • Page 68: Ttl Output

    Diode Analog Ground. These signals allow the user to monitor the voltage across the user’s laser diode using an oscilloscope or similar instrument. The default is to report the voltage at the Model 6100 Laser Diode Driver subsystem’s output connector. Alternatively, the voltage across the LD Cathode Sense / LD Anode Sense signals will be reported if this has been previously selected by a command received via USB interface.

  • Page 69: Analog Input / Analog Input (Return)

    For this application, the analog input can be from an optical power meter representing a laser diode’s optical power. 4.6.8 Chassis Ground For convenience, the Model 6100 has a chassis ground connection on the I/O Signals connector.
  • Page 70 System Operation This page is intentionally left blank...

  • Page 71: Computer Interfacing

    Computer Interfacing General Guidelines The Model 6100 Laser Diode and Temperature Controller has a USB interface to receive commands from, and send responses to, a host PC. The commands supported by the instrument can be divided into the following two categories: commands that cause it to take a desired action, and commands (queries) that cause it to return a stored value.

  • Page 72: Command Termination

    Computer Interfacing 5.2.5 Command Termination All the commands sent to the driver must be terminated by a <CR><LF> sequence. 5.2.6 Response Termination All the responses from the driver are terminated by a <CR><LF> sequence. Controller Operation Mode The Temperature Controller supports two modes of operation: LOCAL and REMOTE.

  • Page 73: Commands And Queries

    Computer Interfacing Commands and Queries There are two types of device commands: commands that cause the instrument to take a desired action, and queries that return a stored value or state of the instrument. Queries must end with a question mark (?), while commands may require parameter(s) to follow: TEC:LIMit:Ite 10.00 For example, the value “10.00”...
  • Page 74 Computer Interfacing Commands and Queries Summary Table Command Syntax Command Description Remarks *IDN? Identification string query *RCL Recall settings Restore instrument to setup state stored in its non- volatile local memory *RST Reset instrument *SAV Save instrument’s settings Save instrument’s current settings in its non-volatile local memory Status Byte Query...
  • Page 75 Computer Interfacing LASer:LIV:GETMEAS? LIV characterization get measurements LASer:LIV:SETUP LIV characterization parameters setup LIV characterization parameters query LASer:LIV:SETUP? Laser photodiode current set point LASer:MDI (IPD) LASer:MDI (IPD)? Measured photodiode current query LASer:MDP (Ppd) Laser photodiode power set point LASer:MDP (Ppd)? Measured photodiode power query LASer:MODE LDD operation mode set LDD operation mode query...

  • Page 76: Table 7 Command Summary

    Computer Interfacing TEC:GAIN:PRESET PID control – preset gains select TEC:GAIN:PRESET? PID control – preset gains select query TEC:Ite Output current setpoint Measured output current query TEC:Ite? Output current limit set TEC:LIM:Ite Output current limit query TEC:LIM:Ite? TEC:LIM:RHI High resistance limit set TEC:LIM:RHI? High resistance limit query TEC:LIM:RLO...
  • Page 77 This query will cause the instrument to return an identification string. Remarks Model Controller Firmware Firmware Name Serial # Date Version # NEWPORT XXXX vYYY mm/dd/yy, SNZZZZ *RCL Recall command. Description *RCL Bin Syntax Argument Value Description Restores factory default settings...
  • Page 78 Computer Interfacing 26. LDD laser diode current ramp parameters 27. LDD photodiode current ramp parameters 28. TEC mode of operation 29. TEC feedback sensor type 30. TEC feedback sensor constants 31. TEC custom feedback thermistor value 32. TEC constant output current setpoint 33.
  • Page 79 Computer Interfacing Response Description Status Byte Register bit 0 Reserved bit 1 Reserved bit 2 Reserved bit 3 Reserved bit 4 Reserved bit 5 Reserved bit 6 Reserved bit 7 Error Message Available ADDRess USB address command. Description ADDRess Value Syntax This command sets the instrument USB address.
  • Page 80 Computer Interfacing Beeper on Test beeper (100ms beep) BEEP? See Also BEEP? Beep query Description BEEP? Syntax This query returns the enable status of the beeper. Remarks Response Description Beeper off beep set Beeper on BEEP See Also BRIGHT Display brightness command Description BRIGHT brightness Syntax...
  • Page 81 Computer Interfacing This query returns a single error number that corresponds to an error occurred since the Remarks last query. This command also clears the read error from the error buffer Refer to Appendix A for a list of error codes generated by the instrument Response Description Error code number per Appendix A, 0 if no errors...

  • Page 82: Table 8 Hwconfig Register

    Computer Interfacing HWCONFIG Hardware configuration register command. Description HWCONFIG Value Syntax Remarks This command sets the hardware configuration register. Please refer the table below for a description of the various bits in this register. Argument Value Description Integer Valid values are between 0 and 255 Value Bit # Meaning...
  • Page 83 Computer Interfacing This query returns the instrument’s hardware configuration register. Remark Response Description Hardware configuration register setting Value HWCONFIG See Also LOCAL Return to local mode. Description LOCAL Syntax This command returns the instrument to local mode after being placed in remote mode by Remarks USB communication interface.
  • Page 84 Computer Interfacing ONDELAY Laser turn on delay command. Description ONDELAY time Syntax This command controls the laser turn on delay. This is the amount of time between the Remarks moment the laser on command is received and the moment the output is actually energized.
  • Page 85 Computer Interfacing Argument Value Description Low bandwidth Value High bandwidth LASer:BW? See Also LASer:BW? LDD bandwidth query. Description LASer:BW? Syntax The LASer:BW? command returns the laser diode driver bandwidth. Remarks Response Value Description Low bandwidth Value High bandwidth LASer:BW See Also LASer:CALMD (CALPD) Laser photodiode feedback responsivity set.
  • Page 86 Computer Interfacing LASer:COND? Laser condition status register query. Description LASer:COND? Syntax This command returns the laser condition status register. Remarks Response Description Value Laser condition status Bit # Meaning Remarks Output soft current limit 0 = Limit not reached; 1 = Limit reached Output soft voltage limit 0 = Limit not reached;...
  • Page 87 Computer Interfacing Argument Value Description current set point Float Laser driver output in mA. Valid values are between 0 and current rating of the instrument. LASer:LDI?, LASer:SET:LDI? See Also LASer:LDI (I)? Measured laser diode current query. Description LASer:LDI (I)? Syntax The LASer:LDI? query returns the value of the measured laser diode current.
  • Page 88 Computer Interfacing LASer:LIMit:LDI? See Also LASer:LIMit:LDI (I)? Laser diode current limit set query. Description LASer:LIMit:LDI? Syntax The LASer:LIMit:LDI? query returns the value of the laser diode current limit. Remarks Response Description current limit Current limit in mA LASer:LIMit:LDI See Also LASer:LIMit:LDV Laser forward voltage limit set command.
  • Page 89 Computer Interfacing Argument Value Description  current limit Float Current limit in A. Valid values are between:  0 and 5000 LASer:LIMit:MDI? See Also LASer:LIMit:MDI (IPD)? Laser photodiode current limit set query. Description LASer:LIMit:MDI? Syntax The LASer:LIMit:MDI? query returns the value of the laser photodiode current limit. Remarks Response Description...
  • Page 90 Computer Interfacing LASer:LIV:COUNT? LIV characterization samples query. Description LASer:LIV:COUNT? Syntax The LASer:LIV:COUNT? query returns the number of measurements taken since the Remarks last time LIV characterization was enabled. Each measurement set consists of laser current setpoint, measured laser current, forward voltage and analog monitor input voltage values.
  • Page 91 Computer Interfacing The LASer:LIV:GETMEAS? query returns the measurements taken since the last time Remarks the LIV characterization process was enabled. Each measurement set consists of four comma delimited values: laser current setpoint, measured laser current, forward voltage, and analog monitor input voltage. When the instrument receives this command from a host PC, it attempts to transfer all measurements taken to the PC.
  • Page 92 Computer Interfacing The LASer:LIV:SETUP? query returns the LIV characterization parameters. Remarks Response Description Start current Start current in Amps End current End current in Amps Number of measurements Dwell Time Dwell time in milli-seconds LASer:LIV:COUNT?, LASer:LIV:ENable, LASer:LIV:GETMEAS? See Also LASer:MDI (IPD) Photodiode current set point command.
  • Page 93 Computer Interfacing This command sets the laser’s constant photodiode power set point. This setpoint is used Remarks only when the LDD is in Constant Photodiode Power (MDP) mode. While this command provides users the convenience of specifying the setpoint in power units (mW), the actual setpoint used by the instrument is photodiode power * photodiode responsivity.
  • Page 94 Computer Interfacing LASer:MODE? Laser operation mode query. Description LASer:MODE? Syntax The LASer:MODE? query returns the selected laser operation mode. Remarks LASer:MODE See Also LASer:MODE:LDI (I) Enter Constant Current mode. Description LASer:MODE:LDI Syntax The LASer:MODE:LDI command sets the instrument to Constant Current mode. Remarks LASer:MODE See Also...
  • Page 95 Computer Interfacing The LASer: MODULATE command sets the laser diode driver modulation Remarks enable/disable state. Argument Value Description Value LASer:MODULATE? See Also LASer:MODULATE? LDD modulation enable/disable query. Description LASer: MODULATE? Syntax The LASer: MODULATE? command returns the laser diode driver modulation Remarks enable/disable state.
  • Page 96 Computer Interfacing LASer:OUTput See Also LASer:PDZERO:ENable Photodiode current zero offset enable command. Description LASer:PDZERO:ENable enable Syntax This command is used to enable/disable a previously specified photodiode zero offset Remarks value. Argument Value Description enable LASer:PDZERO:ENable? See Also LASer:PDZERO:ENable? Photodiode current zero offset enable query. Description LASer:PDZERO:ENable? Syntax...
  • Page 97 Computer Interfacing LASer:MDP (PPD)? Photodiode feedback zero offset query. Description LASer:PDZERO:OFFSET? Syntax The LASer: PDZERO:OFFSET? query returns the laser’s photodiode feedback zero Remarks offset value. Response Description  offset Photodiode zero offset in LASer:PDZERO:OFFSET See Also LASer:RAMP:LDI (I) Laser current ramp settings command. Description LASer:RAMP:LDI step size, delay Syntax...
  • Page 98 Computer Interfacing LASer:RAMP:MDI (IPD) Laser current ramp settings command. Description LASer:RAMP:MDI step size, delay Syntax Sets the laser’s current ramp settings. If bit #1 in hardware configuration register is Remarks cleared (default), the output current is ramped up from the present current set point to the new set point based on these settings.
  • Page 99 Computer Interfacing LASer:RANGE? LDD bandwidth query. Description LASer:RANGE? Syntax The LASer:RANGE? command returns the laser diode driver range. Remarks Response Value Description 500 mA range Value 1500 mA range LASer:RANGE See Also LASer:SET:LDI (I)? Laser constant current set point query. Description LASer:SET:LDI? Syntax...
  • Page 100 Computer Interfacing LASer:MDP See Also LASer:TTL:MODE Laser TTL pulse output mode of operation command. Description LASer:TTL:MODE mode Syntax The LASer:TTL:MODE command selects the instrument’s TTL pulse output operation Remarks mode. The instrument always returns to “enable output” following a power reset. Argument Value Description mode...
  • Page 101 Computer Interfacing TEC:COND? TEC condition status register query. Description TEC:COND? Syntax This command returns the TEC condition status register. Remarks Response Description TEC condition status Value Bit # Meaning Remarks Output soft current limit 0 = Limit not reached; 1 = Limit reached Compliance voltage limit 0 = Limit not reached;...
  • Page 102 Computer Interfacing 9.999 x 10 9.999 x 10 For LM335/AD590 9.999 C Offset 9.999 Slope For RTD 9.999 x 10 RTD Temperature constants 9.999 x 10 9.999 x 10 95.000 to 105.000  If less than four parameters need to be changed, only the desired change needs to be specified, along with the separating commas (see examples).
  • Page 103 Computer Interfacing TEC:GAIN:IL PID control – integral limit. Description TEC:GAIN:IL Value Syntax This command limits the integral factor contribution to PID closed loop control. It is Remarks useful for preventing integral wind-up. Argument Value Description Float Integral limit Value ?; TEC:GAIN:KP; TEC:GAIN:KI; TEC:GAIN:KD TEC:GAIN:IL See Also TEC:GAIN:IL?
  • Page 104 Computer Interfacing ; TEC:GAIN:KP; TEC:GAIN:KI; TEC:GAIN:IL TEC:GAIN:KD See Also TEC:GAIN:KI PID control – integral gain factor. Description TEC:GAIN:KI Value Syntax This command sets the integral gain factor, Ki, used in PID closed loop control. Remarks Argument Value Description Float Integral gain factor Value ?;...
  • Page 105 Description TEC:GAIN:PRESET Value Syntax The 6100 Laser Diode and Temperature Controller has 10 preset PID control loop Remarks settings. This command can be used to select any one of these settings. After issuing this command, the commands such as TEC:GAIN:KP?, TEC:GAIN:KD? etc. can be issued to query the actual PID control loop settings that come with the desired preset bin.
  • Page 106 Computer Interfacing TEC:ITE?, TEC:LIMit:ITE, TEC:SET:ITE? See Also TEC:Ite? TEC measured output current query. Description TEC:Ite? Syntax This query returns the value of the measured TEC output current. Remarks Response Description Current in Amps measured output The TEC current is constantly measured and updated, regardless of the TEC mode of operation.
  • Page 107 Computer Interfacing TEC:LIMit:RHI TEC R limit command. Description TEC:LIMit:RHI limit Syntax This command sets the TEC sensor high resistance limit value. Remarks Argument Value Description float Thermistor limit in kΩ limit AD590 limit in A LM335 limit in mV RTD limit in Ω TEC:LIMit:RHI?, TEC:R See Also TEC:LIMit:RHI?
  • Page 108 Computer Interfacing AD590 limit in A LM335 limit in mV RTD limit in Ω TEC:LIMit:RLO?, TEC:R See Also TEC:LIMit:RLO? TEC R limit query. Description TEC:LIMit:RLO? Syntax This query returns the TEC sensor low resistance limit value. Remarks Response Description Thermistor limit in kΩ limit AD590 limit in A LM335 limit in mV...
  • Page 109 Computer Interfacing Response Description Limit in C, -100 to 240 (200 for LM335 and AD590) limit TEC:LIMit:THI See Also TEC:LIMit:TLO TEC T limit command. Description TEC:LIMit:TLO limit Syntax This command sets the TEC sensor low temperature limit value. Remarks Argument Value Description Limit in C, -100 to 240 (200 for LM335 and AD590)
  • Page 110 Computer Interfacing This query returns the compliance voltage limit value. Remarks Response Description Voltage limit from 0 to 10.0V limit TEC:LIMit:Vte See Also TEC:MODE TEC operation mode command. Description TEC:MODE mode Syntax This command sets the TEC’s mode of operation. Remarks Argument Value...
  • Page 111 Computer Interfacing TEC:MODE:R TEC R mode command. Description TEC:MODE:R Syntax This command selects TEC constant thermistor resistance/linear sensor reference mode. Remarks Since sensor resistance (or linear sensor reference) is a function of temperature, this mode also controls the TEC output temperature, but it bypasses the use of the conversion constants for set point calculation.
  • Page 112 Computer Interfacing TEC:OUTput? See Also TEC:OUTput? TEC output enable query. Description TEC:OUTput? Syntax This query returns the status of the TEC output. Remarks Response Value Description enable Although the status of the switch is on, the output may not have reached the set point value.
  • Page 113 Computer Interfacing Measured AD590 current in A Measured LM335 voltage in mV Measured RTD resistance in Ω This measurement is updated approximately once every 10 milliseconds. TEC:R See Also TEC:SENsor TEC sensor select command. Description TEC:SENsor sensor Syntax This command is used to set the sensor type. This value is a coded representation of the Remarks sensor type/thermistor current.
  • Page 114 Computer Interfacing Reserved LM335 AD590 Custom Thermistor TEC:SENsor See Also TEC:SET:ITE? TEC ITE set point query. Description TEC:SET:ITE? Syntax This query returns the TEC constant current set point value. Remarks Response Description ITE set point in Amps set point TEC:I See Also TEC:SET:R? TEC R set point query.
  • Page 115 Computer Interfacing TEC:T See Also TEC:T TEC temperature set point command. Description TEC:T set point Syntax This command sets the TEC constant temperature set point. Remarks Argument Value Description Set point in C float set point TEC:SET:T?, TEC:T See Also TEC:T? TEC measured temperature query.
  • Page 116 Computer Interfacing This query returns the custom thermistor feedback sensor rating. Remarks Response Description resistance in kΩ rating TEC:THERM See Also TEC:Vte? TEC compliance voltage query Description TEC:V? Syntax This query returns the TEC compliance voltage. Remarks Response Description TEC voltage in volts voltage TEC:I? See Also...

  • Page 117: Principles Of Operation

    Principles of Operation Introduction Features of the Model 6100 Laser Diode and Temperature Controller include:  High-stability, low noise design  Fault detection  Current, voltage and temperature limiting CAUTION Although ESD (electrostatic discharge) protection is designed into the driver, operation in a static-free work area is recommended.
  • Page 118 Special circuits in the TEC and Laser Diode drivers are present for detecting intermittent contacts and connections. These circuits detect the abrupt change in current that occurs when the output circuit is opened, and the model 6100 will generate an error.

  • Page 119: Tec Controller Operation

    In the 6100 the practical upper temperature limit is the temperature at which the thermistor becomes insensitive to temperature changes. The maximum ADC input voltage of the 6100 limits the lower end of the temperature range. Thermistor resistance and voltage are related through Ohm's Law (V = I x R).

  • Page 120: Figure 34 Thermistor Temperature Range

    Principles of Operation Figure 34 Thermistor Temperature Range 6.3.1.3 Temperature Resolution You must also consider measurement resolution since the resolution decreases as the thermistor temperature increases. The microprocessor converts this digital number to resistance, stores this resistance, then converts it to a temperature using the Steinhart-Hart equation, and stores this temperature.
  • Page 121 If you require a different temperature range or the accuracy you need can't be achieved with either current setting, select another thermistor. Thermistor temperature curves, supplied by the manufacturer, show the resistance versus temperature range for many other thermistors. Contact a Newport application engineer with your specific application. 6.3.1.6...

  • Page 122: Figure 35 Thermistor Resistance Verus Temperature

    The equation will produce temperature calculation errors of less than 0.01C over the range -20 C to 50 C. The constants C1, C2, and C3 are expressed in the form n.nnnn, simplifying entry into the 6100.

  • Page 123: Ad590 And Lm335

    6.3.1.7 Table of Constants Common thermistors and the appropriate calibration constants for the temperature range -20 C to 50 C are listed in Table 9. The Model 6100 uses the BetaTHERM 10K3 thermistor values by default. Manufacturer C1 * 10...

  • Page 124: Figure 36 Ad590 Nonlinearity

    Principles of Operation where i is the nominal current produced by the AD590, and K is in Kelvin. The 6100uses i to determine the nominal temperature, T , by the formula: = (i /(1 A / K) ) - 273.15 is in C.
  • Page 125 , which is displayed by the 6100 is calculated as follows: = C1 + (C2 * T where C1 and C2 are the constants stored in the 6100 for the LM335. When the LM335 is calibrated to 25C, C1 = 0 and C2 = 1, and the temperature accuracy is typically 0.5C over the rated operating range.
  • Page 126 It is used to determine the zero offset of the device, and it assumes that the gain (slope) is known. 1. Allow the 6100 to warm up for at least one hour. Select the desired sensor type in the setup menu.

  • Page 127: Table 10 Rtd Constants

    Principles of Operation For best results, make the range between T and T as narrow as possible. 5. Determine the new value of C1 and C2 from the following calculations. C2 = (T ) / (T ), and C1 = T - (T * C2) 6.

  • Page 128: Laser Diode Driver Operation

    Laser Diode Driver Operation 6.4.1 Operating Modes The Model 6100’s Laser Diode Driver subsystem operates in one of two modes – CW or EXTERNAL ANALOG CONTROL. Following power-up, the unit always will be in CW mode. The user may then change to EXTERNAL ANALOG CONTROL mode using the LAS:MODE command via the USB interface.

  • Page 129: Control Modes

    Principles of Operation 6.4.2 Control Modes The Model 6100’s Laser Diode Driver subsystem operates in one of two control modes – Constant Current Control Mode or Constant Power Control Mode. Following power-up, the unit always will be in Constant Current Control Mode.

  • Page 130: Ttl Output Modes

    TTL Output Modes The TTL Output signal on the rear panel SIGNALS I/O connector allows the user to monitor certain states of the Model 6100, or to control or trigger external measurement equipment. This output operates one of five modes –...

  • Page 131: Pulse Monitor Ttl Mode

    For fast LIV characterization, with measurements every 10 ms, use HWCONFIG command to set bit 2 of the configuration register to 1. The Model 6100 supports a data acquisition engine that enables users to perform LIV characterization of laser diodes with relative ease. The users can define their desired start and end output current values, number of measurements and the dwell time at each current step.
  • Page 132 Principles of Operation synchronize measurements from instruments such as power meter or temperature controller with laser diode current and voltage values. For instance, users can supply voltage that represents photodiode current or thermopile voltage from a power meter to the analog control input to determine current versus optical power characteristics of a laser diode.
  • Page 133 Principles of Operation...

  • Page 134: Tips And Techniques

    Tips and Techniques Introduction This section explains operational details of the Model 6100 Laser Diode and Temperature Controller and provides application examples. TEC Limits The Temperature Controller subsystem has several limits to protect the TEC from damage. The limits include current and compliance voltage.

  • Page 135: Grounding A Tec

    Temperature Controller subsystem. Grounding a TEC The Model 6100 Temperature Controller outputs are isolated from earth (chassis) ground. Isolating the TEC case avoids damaging the device from multiple ground loop potentials, AC transients, or static discharge. Since test...

  • Page 136: Voltage Limit

    Tips and Techniques  The second circuit monitors the actual current drive and, if that exceeds the limit set point, shuts down the output. This form of limit is called the hard limit. The Laser Diode Driver subsystem will always be shut down on a hard limit.

  • Page 137: Grounding A Laser Diode

    This will help minimize noise, transients, and ground loop hazards. Be sure to include any signal generators in your ground circuit. If you have additional questions about your earth grounding method, contact a Newport applications engineer. Measurements The attached laser diode’s forward voltage (V ) is normally sensed at Laser Diode Driver subsystem output connector.

  • Page 138: Maintenance And Service

    2. Instrument serial number (on rear panel or bottom of enclosure) 3. Description of the problem. If the instrument is to be returned to Newport Corporation, you will be given a Return Number, which you should reference in your shipping documents.

  • Page 139: Service Form

    Service Form Newport Corporation U.S.A. Office: 800-222-6440 FAX: 949/253-1479 Name _______________________________ Return Authorization #__________________ (Please obtain RA# prior to return of item) Company ________________________________________________________________________ (Please obtain RA # prior to return of item) Address ________________________________ ____________________Date _________________ Country _______________________ Phone Number ______________________________________ P.O.

  • Page 141: Appendix A – Error Messages

    Appendix A – Error Messages Introduction The communication errors can be retrieved with the following commands: ERR? or ERRSTR?. The descriptions of the returned errors are detailed in the next sections. Error Description A description of error codes and corresponding error strings generated by the TEC Driver is given below: Error Error String...
  • Page 142 Appendix A-Error Messages WIDTH “LASer:PULse:FREQuency” or “LASer:PULse:WIDth” commands with parameter settings that violate the following constraint: pulse width must be less than pulse period (1/frequency). The Temperature Controller subsystem output has been TEC SENSOR OPEN turned OFF because the input voltage from AD590 sensor is less than –0.50V or voltage from LM335 sensor is greater than 1.50V.
  • Page 143 This error is generated when user tries to set custom WRONG TEC thermistor sensor rating using TEC:THERM command, SENSOR but the sensor type is not a Custom Thermistor. subsystem output has been turned LDD INTERLOCK Laser Diode Driver OFF because of remote interlock assertion (Laser Diode Driver subsystem output connector).
  • Page 144 Appendix A-Error Messages TEC OUTPUT OFF This error is generated when user attempts to enable LDD output with TEC output disabled. It is also generated when LDD output is disabled automatically due to TEC output getting disabled. This laser diode protection requires bit #7 in hardware configuration register is set to zero.
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  • Page 146 Tel: 949-863-3144 Fax: 949-253-1680 Internet: sales@newport.com Visit Newport Online at: www.newport.com Newport Corporation, Irvine, California; Evry and Beaune-La-Rolande, France have all been certified compliant with ISO 9001 by the British Standards Institution. Mountain View, California is DNV certified. Printed in U.S.A.

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