The ILX Lightwave CSM-39420 is a 4-channel laser diode current source module engineered for precision independent control of multiple laser diodes. Each channel delivers isolated current output capable of driving individual laser diodes with stable, accurate operation. This module installs into the LDC-3900 Modular Laser Diode Controller mainframe and supports external modulation and photodiode feedback control for advanced optical systems.
## Technical Specifications
• **Module Type:** 4-Channel Laser Diode Current Source
• **Channels:** 4 independent current source channels with isolated outputs
• **Modulation Input:** 400 mV/A signal with 10 kΩ input impedance
• **Photodiode Bias:** Adjustable 0–5 V reverse bias via back panel control or BNC connector
• **Photodiode Input:** Dedicated pins 6 and 7 for photodiode signal acquisition
• **Laser Output Configuration:** Both output terminals isolated from chassis ground; either terminal may be user-grounded
## Key Features
• Independent current control across all four channels ensures simultaneous multi-diode operation without crosstalk
• Photodiode feedback mode enables closed-loop power stabilization
• Modulation input accepts standard external control signals
• Configurable photodiode reverse bias accommodates diverse photodetector requirements
• Rear-panel bay installation integrates into existing LDC-3900 systems
## Typical Applications
• Optical component testing and validation
• Laser diode characterization and performance mapping
• Multi-channel laser research and development setups
• MOPA (Master Oscillator Power Amplifier) laser systems when paired with complementary modules
## Compatibility & Integration
Designed exclusively for the ILX Lightwave LDC-3900 Modular Laser Diode Controller mainframe. Operates alongside other CSM and TCM modules—such as the CSM-39020 and TCM-39032—to build application-specific configurations. This product is discontinued and no longer actively manufactured or supported.
