The ILX Lightwave CSM-39400M is a precision current source module engineered for integration into the LDC-3900 Modular Laser Diode Controller mainframe. It delivers stable, accurate current output essential for reliable laser diode operation in MOPA and tunable laser applications. The module operates in constant current and constant power modes, incorporates analog modulation capability, and features integrated laser diode protection circuits. Fully isolated from other modules, it eliminates ground loop issues while providing remote control via GPIB/IEEE-488.2 interface.
## Technical Specifications
**Output Current**
• Range: 0 to 4 A (0 to 4000 mA)
• Setpoint Resolution: 100 µA
• Setpoint Accuracy: ±0.1% of Full Scale
• Drive Current Limit Settings: 0–4000 mA with 16 mA resolution and ±40 mA accuracy
• Compliance Voltage: 5 V
**Stability & Temperature Performance**
• Temperature Coefficient: < 100 ppm/°C
• Short-Term Stability (1 hour): < 20 ppm
• Long-Term Stability (24 hours): < 40 ppm
• Output Stability: 0.02%
**Photodiode Feedback**
• Type: Transimpedance
• Reverse Bias: 0–5 V, adjustable via back panel
• Current Range: 0–20 mA
• Input Isolation: Electrically isolated from ground and other modules
**Analog Modulation**
• Input Impedance: 10 kΩ
• Signal: 400 mV/A modulation
## Key Features
• Dual operational modes: Constant Current (CC) and Constant Power (CP)
• Integrated laser diode protection circuits
• Analog modulation input for external signal control
• GPIB/IEEE-488.2 remote programming capability
• Rear-loading module bay with locking screws; slides into LDC-3900 mainframe
• Electrical isolation prevents inter-module ground loops
## Typical Applications
• Master Oscillator Power Amplifier (MOPA) systems
• Tunable laser control and stabilization
• High-precision laser diode bias and drive circuits
## Compatibility & Integration
Designed exclusively for the ILX Lightwave LDC-3900 Modular Laser Diode Controller. Operates across 10 °C to 40 °C; designed for indoor use at altitudes up to 3000 m (9843 ft). Calibration recommended every 12 months.
