ILX Lightwave LDX-36025-12 – Laser Diode Driver, High Power CW/QCW

The ILX Lightwave LDX-36025-12 is a high-power laser diode driver delivering 25 A in continuous wave (CW) mode and 50 A in quasi-continuous wave (QCW) mode, with 12 V compliance voltage. Engineered for precision current and temperature control, this instrument combines stable output with fast protection circuits—current limit response under 2 µs, open circuit detection under 50 µs—making it suitable for research, development, and manufacturing environments. The driver features four-wire voltage measurement, photodiode monitoring with 0–15 V reverse bias capability, and thermistor-based temperature measurement. A 5-digit green LED display provides real-time parameter monitoring and error indication via discrete LEDs and error codes.

## Technical Specifications

**Output Current**
• CW: 25 A
• QCW: 50 A
• Setpoint resolution: 10 mA
• Setpoint accuracy: ±(0.1% of FS + 20 mA)
• 1-hour stability: <100 ppm FS
• Noise/ripple (rms): <10 mA
• Temperature coefficient: <50 ppm FS/°C

**Pulsed Operation**
• Pulse width: 40 µs to 2 s
• Repetition rate: 0.1 to 1000 Hz
• Duty cycle: 0.5 to 20 %
• Rise/fall time: <10 µs

**Voltage & Measurement**
• Compliance voltage: 12 V
• Forward voltage accuracy: +0.05% of 20 mV
• Forward voltage resolution: 10 mV
• Monitor current range: 3 to 10000 µA
• Monitor current accuracy: ±0.1% FS
• Photodiode reverse bias: 0 to 15 V

## Key Features

• Hardware fault response: <2 µs (current limit), <50 µs (open circuit)
• Adjustable current and voltage limits: 0 to full scale
• Output shorting relay (normally closed)
• Interlock response time: <6 ms
• Slow start turn-on and fast error detection
• Floating outputs
• Transient protection (output switching, power cycling, EFT/surge)
• Four-wire voltage measurement for accurate readings with long cables
• Rotary digital encoder control for setpoints and calibration

## Typical Applications

High-power laser diode characterization, pulsed laser systems, fiber-coupled and direct-emitter applications requiring precision current sourcing and real-time optical feedback.

## Compatibility & Integration

Thermistor temperature input. Photodiode monitor output. Configurable LED display for current, voltage, power, and temperature parameters.