The ILX Lightwave LDC-3714C is a precision laser diode controller delivering dual current output ranges of 50 mA and 100 mA for low to medium power laser diode applications. It integrates a low-noise current source with a 32W thermoelectric cooler (TEC) controller, enabling independent regulation of laser drive current and operating temperature. The instrument supports three operating modes—Constant Current (Low Bandwidth to 15 kHz), Constant Current (High Bandwidth to 1 MHz), and Constant Optical Power—accommodating both DC operation and dynamic modulation. Set point accuracy of ±0.05% FS with 1 µA resolution (50 mA range) ensures stable wavelength control critical for research, development, and production testing.
## Technical Specifications
**Laser Current Source**
• Current output ranges: 50 mA / 100 mA
• Set point accuracy: ±0.05% FS
• Setpoint resolution: 1 µA (50 mA range) / < 2 µA (100 mA range)
• Short-term stability (1 hour): < 20 ppm FS
• Long-term stability (24 hours): < 40 ppm FS
• Current noise and ripple: < 1.5 µA
• Output stability: 0.02%
• Temperature coefficient: 8 V DC
• Sensor compatibility: Thermistor, IC, and RTD
**Photodiode Feedback**
• Type: Differential
• Photodiode reverse bias: 0–5 V adjustable
• Photodiode current range: 5–5000 µA
## Key Features
• Four-wire laser forward voltage measurement
• Photodiode-based constant optical power feedback mode
• Differential modulation input supporting independent grounds
• Slow start, adjustable current limit, and intermittent contact protection
• Output shorting relays for laser protection
• TEC bipolar constant current source with forward voltage monitoring
## Typical Applications
Precision wavelength locking, optical power stabilization, and dynamic laser tuning in laboratory and manufacturing environments where temperature and current stability directly impact performance.
## Compatibility & Integration
USB and GPIB/IEEE-488 remote interfaces enable integration into automated test systems. Supports ILX model TS-510 calibrated 10 kΩ thermistors.
