The ILX Lightwave LDC-3714 is a precision laser diode controller delivering selectable 50 mA and 100 mA output ranges with sub-microamp resolution and sub-percent accuracy. Built for research, development, and production test environments, it combines low-noise drive electronics with an integrated 32 W temperature controller and comprehensive laser protection. Dual modulation modes support DC operation and high-bandwidth external modulation up to 1 MHz, while photodiode feedback monitoring enables closed-loop optical power stabilization.
## Technical Specifications
### Drive Current
• Output ranges: 0–50 mA and 0–100 mA (selectable)
• Setpoint resolution: 1 µA (50 mA range); < 2 µA (100 mA range)
• Setpoint accuracy: ±0.05% of full scale
• Output noise and ripple: < 1.5 µA (both ranges)
• Compliance voltage: 0–10 V (adjustable)
• Current limit: 1–50.5 mA (50 mA range, ±0.5 mA accuracy); 1–101 mA (100 mA range, ±1 mA accuracy)
• Short-term stability (1 hour): < 20 ppm
• Long-term stability (24 hour): < 40 ppm
• Temperature coefficient: 8 V DC
• Sensor types: Thermistor, IC, RTD
• Control modes: Constant temperature, constant sensor, constant TE current
### Photodiode Feedback
• Reverse bias: 0–5 V (adjustable)
• Current range: 5–5000 µA
### Modulation
• Analog modulation: Up to 1 MHz (Mode 2); up to 15 kHz (Mode 1)
• Input: Differential
## Key Features
• Dual-range current architecture optimizes precision across low and mid-level diode currents
• Laser diode protection strategies integrated throughout design
• Multiple temperature sensor compatibility for diverse thermal management configurations
• Two modulation modes support both DC-optimized low-noise operation and high-frequency external control
## Typical Applications
• Laser diode characterization in R&D environments
• Automated production testing of single and multi-emitter arrays
• Wavelength stabilization via integrated temperature feedback
• Optical power control through photodiode-based closed loops
## Compatibility & Integration
Accepts industry-standard thermistor, IC, and RTD temperature sensors. TEC interface supports bipolar constant-current architecture with user-defined compliance. Photodiode reverse-bias control enables wide dynamic range optical feedback monitoring.
