ILX Lightwave LDC-39100 Modular Laser Diode Controller

The ILX Lightwave LDC-39100 is a 1 A Current Source Module (CSM) designed for precision laser diode control within the LDC-3900 Modular Laser Diode Controller mainframe. This service-free module delivers high-stability, low-noise output with on-module calibration data storage and closed-case calibration capability. It integrates into any of four interchangeable module bays, enabling flexible system configuration alongside TEC modules and combination units.

The CSM-39100 supports photodiode feedback control, modulation input, and both local and remote calibration via GPIB interface.

Technical Specifications

• Maximum Output Current: 1 A


• Modulation Input Signal Level: 100 mV/A


• Modulation Input Impedance: 10 kΩ


• Photodiode Adjustable Reverse Bias: 0–5 V


• Laser Output: Isolated from chassis ground; either output terminal can be grounded


• Module Weight (typical): 1.05 kg (2.3 lbs)


• Warm-up Period (pre-calibration): 1 hour

Key Features

• On-module calibration data storage with service-free modularity


• Closed-case calibration capability


• Photodiode feedback control mode with adjustable reverse bias (0–5 V)


• Front-panel PHOTODIODE BIAS ADJUST control and BNC connector option on back panel


• Flexible setup via LDC-3900 Save/Recall functions


• Modulation input for dynamic current control


• Local (front panel) and remote (GPIB) calibration procedures

Typical Applications

• High-precision laser diode bias and modulation control


• Optical communications and test instrumentation


• Research and development in photonics and fiber-optic systems


• Multi-channel laser systems requiring modular expansion

Compatibility & Integration Designed exclusively for the ILX Lightwave LDC-3900 Modular Laser Diode Controller mainframe. Interchangeable with other LDC-3900 series modules, including current source variants (200 mA to 8 A), thermoelectric cooler (TEC) modules (up to 32 W), and combination current source/TEC modules. The LDC-3900 mainframe provides four rear-loading bays, 4 independent channels with 8 isolated outputs, and supports standard GPIB IEEE interface (optional).