Summary of Contents for Wavelength Electronics LFI 4500 Series
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- Page 2 LFI 4500 Series Laser Diode Drivers User’s Guide...
- Page 4 LFI-4500 Laser Diode Driver User’s Guide Publication number 92-130004D © Copyright 1996, 1997, Wavelength Electronics, Inc. P O Box 865, Bozeman, MT 59771 All Rights Reserved Printed in U. S. A.
- Page 5 Laser Diode Drivers The 4500 series of laser diode drivers offers an unprecedented combination of safety, performance, and value. Low noise, stable operation makes these flexible instruments ideal for even the most demanding applications. Any combination of LFI modules (both laser diode drivers and temperature controllers) can be interconnected to provide a complete laser diode control solution.
- Page 6 LFI 4500 Series Selection Guide Model Description LFI-4502 200 mA Laser Diode Driver LFI-4505 500 mA Laser Diode Driver LFI-4510 1 Amp Laser Diode Driver LFI-4532 3.25 Amp Laser Diode Driver LFI-4565 6.5 Amp Laser Diode Driver Each model includes: 9&15 pin D-sub plugs with shielded covers and hardware, user guide, and AC power cord.
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Page 7: Default Configuration From The Factory
Default Configuration from the Factory The following are the factory default settings. Rear Panel: CONFIGURATION SWITCH: 2 3 4 5 6 7 CONFIGURATION Mode of Operation: Constant Current Modulation Bandwidth: Fully limited PD Current Range: 2000 µA Modulation Sensitivity: 10:1 Modulation Input: Disabled Front Panel: Current Limit:... -
Page 8: Table Of Contents
TABLE OF CONTENTS Default Configuration from the Factory____________6 Safety Summary ______________________________8 Front Panel At a Glance _______________________10 Rear Panel At a Glance ________________________12 Preparing the Laser Diode Driver for Use _________15 Operating Guidelines _________________________16 Operation in Constant Current Mode __________ 16 Operation in Constant Power Mode ___________ 19 Set Current Limit ___________________________ 22 Further Information ___________________________23... -
Page 9: Safety Summary
Safety Summary Do not install substitute parts or perform any unauthorized modification to the product. Return the product to Wavelength Electronics for service and repair to ensure that safety features are maintained. Do not use this product beyond its specifications. - Page 10 Complete all operational steps in the order provided. Skipping a step can result in damage to the laser diode. Start with the NOTE! section appropriate to the mode of operation you are using. WARNING For continued protection against fire, replace line fuse only with fuse specified, type and rating.
- Page 12 Output Section: Output Enable Button: This switch enables and disables the laser diode current source output. When first enabled, the output current goes through a slow-start sequence. The slow start will delay the output of current for three seconds then slowly ramp the output current (approximately 500 ms) to the preset output current setting.
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Page 13: Rear Panel At A Glance
Rear Panel At A Glance The following terms for the rear panel components will be referenced throughout this manual. Analog Input Serial Number 6B4A1001 Analog Interface Output Connector Connector Configuration Switch Bank AC Fuse Voltage Select Switch AC Power Input Output Connector Description 9 pin D-sub recp Pin 1: Not Used... - Page 14 Configuration Switch Bank: This ten position switch bank configures the mode of operation (constant current or constant power), the bandwidth of the output current, the range of photodiode sensitivity, and the modulation transfer function. Switches 1, & 2: (Constant Current or Constant Power Mode of Operation One of these switches must be on for proper operation.
- Page 15 Analog Interface Connector: ANALOG 50 Ω Terminator INPUT BNC & 15 pin D-sub receptacle ANALOG INTERFACE Pins 1 & 2: (Analog Input+, Analog Input-) External analog input. The BNC is in parallel, but isolated by two 1kΩ resistors. Either of the inputs can be used, but not simultaneously.
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Page 16: Preparing The Laser Diode Driver For Use
Preparing the Laser Diode Driver for Use Check the list of supplied items: One Power cord One 9 pin D-Sub plug (solder cup), hood, and connecting hardware One 15 pin D-Sub plug (solder cup), hood, and connecting hardware One AC Fuse installed One AC Fuse is shipped separately þ... - Page 18 Step 4: Select the Modulation Input Bandwidth When only DC control of the output is necessary, the noise performance can be maximized by applying a single pole filter to the setpoint signal (the sum of the Adjust Potentiometer and Modulation Input). This filter is inserted when Switch 6 is ON. 2 3 4 5 6 7 2 3 4 5 6 7 CONFIGURATION...
- Page 21 Step 4: Select the Modulation Input Bandwidth When only DC control of the output is necessary, the noise performance can be maximized by applying a single pole filter to the setpoint signal (the sum of the Adjust Potentiometer and Modulation Input). This filter is inserted when Switch 6 is ON. 2 3 4 5 6 7 2 3 4 5 6 7 CONFIGURATION...
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Page 24: Further Information
Error and Status Indicators Several LED indicators and a beeper are used to determine the status of the controller. Status Section Power LED: This LED lights green whenever the AC Power Switch on the front panel is depressed and AC power is supplied to the unit. Remote Error LED: This LED lights red whenever an error triggered by an LFI-3500 Temperature Controller is detected on the Analog Interface Connector on the rear panel. -
Page 25: Analog Interface
Analog Interface Pins 1 & 2: (Mod+, Mod-) An external analog signal can be directly connected to these pins (or the Analog BNC input) to remotely control the unit’s output current setpoint (Laser diode forward current in constant current mode and monitor photodiode current in constant power mode). - Page 26 An open drain or open collector output from a digital section can be used to trigger this input also, if the signal is momentary and does not exceed 500 msec. Pins 11 & 15: (PD I, Monitor Common) This pin provides a buffered measurement of the current produced by the laser diode’s monitor photodiode (pins 4 and 5 on the Output Connector) and is referenced to pin 15.
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Page 28: General Specifications
LFI 4500 General Specifications Power Supply: 115 or 230 VAC ±15% 50 or 60 Hz (switch selectable on rear panel) Maximum AC Input: 250VAC Power Consumption: 160VA Peak Size (W x D x H) 106 mm x 300 mm x 163 mm (4.25"... -
Page 29: Electrical Specifications
LFI-4500 ELECTRICAL SPECIFICATIONS Model Number LFI-4502 LFI-4505 LFI-4510 LFI-4532 LFI-4565 Drive Current Output Output Current Range 0 - 200 mA 0 - 500 mA 0 - 1 Amp 0 - 3.25 Amps 0 - 6.5 Amps Compliance Voltage > 4.3 V >... -
Page 30: Mechanical Specifications
MECHANICAL SPECIFICATIONS... -
Page 32: Warranty
If you have any questions or comments, please call our technical staff at (406) 587-4910. Our hours are 8:00 a.m. to 5:00 p.m. MT. Wavelength warrants the LFI 4500 Series laser diode drivers controllers for one year against defects in materials and workmanship when used within published specifications.