ILX Lightwave CSM-39440: 4-CH Laser Diode Current Source Module

The ILX Lightwave CSM-39440 is a 4-channel laser diode current source module engineered for precise, independent current control across multiple laser diodes. Each channel operates independently, enabling stable and accurate simultaneous operation of four laser diodes within a modular system architecture. The module integrates into the ILX Lightwave LDC-3900 Modular Laser Diode Controller via rear-loading module bays, providing essential current sourcing and modulation capabilities for laser diode test, characterization, and system integration applications.

## Technical Specifications

• **Channels:** 4 independent current source channels
• **Module Interface:** Rear-loading bay for LDC-3900 mainframe integration
• **Modulation:** 400 mV/A modulation signal capability; modulation input impedance 10 kΩ
• **Laser Diode Connections:** 9-pin D-connector per channel (rear panel)
• **Electrical Isolation:** Each module bay is fully isolated (electrically floating) from all other modules, preventing ground loops
• **Physical Dimensions:** 10 × 8 × 8 in; Weight: 5 lbs

## Key Features

• Independent current control for each of the four channels
• Full electrical isolation between channels eliminates ground-loop-related laser damage
• Integration with LDC-3900 mainframe supports GPIB/IEEE-488.2 for remote programming and automated control
• Rear-panel laser diode connections keep system wiring clean and compact
• Modulation input accommodates AC signal overlay on DC bias current

## Compatibility & Integration

The CSM-39440 is designed exclusively for the ILX Lightwave LDC-3900 Modular Laser Diode Controller. The host LDC-3900 mainframe provides power supply and GPIB communication interface, enabling remote operation and readout via standard IEEE-488.2 commands. Supply voltage stability should not exceed ±10% nominal fluctuation.