ILX Lightwave CSM-39437: 4-CH Laser Diode Current Source Module

The ILX Lightwave CSM-39437 is a 4-channel laser diode current source module engineered for integration into the LDC-3900 Modular Laser Diode Controller mainframe. This dual-function module operates as both a laser diode current source and Temperature Controlled (TEC) controller, delivering independent current sourcing across four channels with full electrical isolation to eliminate ground loops. Each channel functions independently, supporting flexible configuration for laser diode control and thermal management in multi-channel applications.

Technical Specifications Current Source Performance

Maximum LD current output: 8 A per channel (current source mode)

LD current output (combination mode): 2 A per channel

Current resolution: 0.1 mA

Current accuracy: ±0.1% of Full Scale

Current stability (1-hour): 20 ppm of FS

Current stability (24-hour): 40 ppm of FS

Output noise/ripple: <20 µA TEC Controller Performance

Maximum TEC power support: 32 W (standalone mode)

TEC output (combination mode): 12 W Operating Modes

Constant Current mode

Constant Power mode

External modulation: 0–50 kHz (high bandwidth), 0–2 kHz (low bandwidth)

Key Features

Four independent, fully isolated channels prevent laser-damaging ground loops

Flexible current sourcing up to 8 A per channel

Combination mode allows simultaneous laser diode and TEC control from single module

Precision stability across extended timeframes

High and low bandwidth modulation support

Compatibility & Integration The CSM-39437 is designed exclusively for the LDC-3900 Modular Laser Diode Controller mainframe. It is a legacy product no longer manufactured or supported; pre-owned units may be available through third-party suppliers.