The ILX Lightwave LDC-3714B is a precision laser diode controller delivering selectable 50 mA or 100 mA output current for stable, low-noise control of low to medium power laser diodes. Part of the LDC-3700 Series, this microprocessor-based instrument integrates a high-performance current source with a 32W temperature controller, ensuring consistent optical output and robust laser diode protection. The dual-stage architecture isolates laser and temperature control power supplies, enabling independent operational modes and modulation up to 1 MHz.
## Technical Specifications
**Laser Diode Current Source**
• Current ranges: 50 mA or 100 mA (selectable)
• Setpoint resolution: 1 µA (50 mA range), 2 µA (100 mA range)
• Accuracy: ±0.05% of full scale
• Drive current limit: 1–50.5 mA (50 mA range), 1–101 mA (100 mA range)
• Limit resolution: 0.25 mA (50 mA range), 0.5 mA (100 mA range)
• Limit accuracy: ±0.5 mA (50 mA range), ±1 mA (100 mA range)
• Compliance voltage: 0–10V adjustable, 50 mV resolution, ±2.5% accuracy
• Output noise and ripple: <2 µA
• Short-term stability: <20 ppm
• Modulation bandwidth: DC to 1 MHz (analog, differential input)
**Temperature Controller**
• Integrated power: 32W
• Compatible sensors: Thermistor, IC, RTD
• TEC output: 4A, 8V (LDC-3700C Series)
• Temperature stability: ±0.004°C
• Resolution: 0.01°C (LDC-3700C Series)
• Accuracy: 0.05°C with calibrated sensor (LDC-3700C Series)
## Key Features
• Three operating modes: constant current low bandwidth (≤15 kHz external modulation), constant current high bandwidth (≤1 MHz), constant optical power
• Comprehensive laser protection: slow start, adjustable current limit, adjustable compliance voltage limit, intermittent contact protection, output shorting relays, floating output, power line surge and EFT transient protection
• Semiconductor switch with isolated power supplies
• Differential modulation input for independent control and laser output grounding
## Typical Applications
Laser diode stabilization in fiber optics, spectroscopy, and optical instrumentation requiring precise current and temperature management with external modulation capability.
## Compatibility & Integration
Supports thermistor, IC, and RTD temperature sensors. Adjustable compliance voltage and independent current limits enable integration with diverse laser diode types and configurations.
