The ILX Lightwave LDX-3660 is a high-performance current source engineered for precise control and testing of high-power laser diodes. Delivering 0–20 A output with 10 mA resolution and 0.05% + 10 mA accuracy, this instrument provides the stability and low noise required for demanding photonic characterization tasks. The LDX-3660 integrates 4-wire forward voltage measurement, photodiode current monitoring, and quasi-continuous wave pulse capability, making it suitable for both steady-state and dynamic laser diode evaluation.
## Technical Specifications
**Drive Current Output**
• Output range: 0–20 A
• Set-point resolution: 10 mA
• Set-point accuracy: 0.05% + 10 mA
• Settling time: 20 μs
• Stability: 100 ppm
• Temperature coefficient: 50 ppm/°C
• Output noise and ripple: 5 mA
**Compliance & Power**
• Maximum power: 200 W
• Compliance voltage: 10 V max
**Forward Voltage Measurement**
• Range: 0.00–10.00 V (4-wire)
• Resolution: 10 mV
• Accuracy: ±20 mV
**Photodiode Current Measurement**
• Range: 0–10000 μA
• Resolution: 3 μA
• Accuracy: 0.1%
• PD responsivity range: 0.001–20.000 mA/W
**Quasi-Continuous Wave Mode**
• Pulse width: 40 μs–600 ms (±1 μs accuracy, 1 μs resolution)
• Pulse frequency: 1–1000 Hz (±0.1 Hz accuracy, 0.1 Hz resolution)
• Duty cycle: 0.1–60% (0.1% resolution)
• Rise/fall time: <10 μs
• Overshoot: <5%
**Temperature Monitoring**
• NTC thermistor sensor
• Range: -99°C to +199.9°C
• Accuracy: ±0.1°C
## Key Features
• IEEE 488/GPIB interface for remote instrument control
• TTL event triggering output (50 Ω) and pulse triggering input (single shot to 1 kHz)
• Adjustable voltage and current limits with output shorting relays
• Low-noise current delivery with <5% overshoot and <10 μs switching transitions
• Integrated laser protection mechanisms
## Typical Applications
• High-power laser diode characterization and reliability testing
• Pulsed laser diode drive and performance evaluation
• Photodiode responsivity and forward voltage measurement
• Thermal monitoring during laser operation
## Compatibility & Integration
Operates from 0°C to 40°C with storage capability to -40°C to 70°C. Suitable for laboratory environments up to 3000 m altitude with relative humidity below 80% (non-condensing). Mains supply voltage tolerance ±10% of nominal.
