LX Lightwave LDC-3724 Laser Diode Controller

The LX Lightwave LDC-3724 is a precision laser diode controller delivering integrated current and temperature management for laboratory and industrial applications. It provides dual-range laser current sourcing (0–200 mA and 0–500 mA) with ±0.05% FS accuracy, photodiode feedback control for constant optical power regulation, and TEC control up to 16 W or 32 W across a temperature range of −100°C to 199°C. Three operating modes—low-bandwidth constant current (DC to 15 kHz), high-bandwidth constant current (to 1 MHz), and constant optical power—accommodate diverse laser tuning and modulation requirements. Short-term current stability reaches <20 ppm, while temperature control achieves ±0.004°C short-term stability with 0.01°C long-term performance. Multi-layer protection includes independent current limits, slow-start turn-on, isolated power supplies, fast output shut-off, and output shorting relays.

– Technical Specifications

Laser Current Source
• Output current: 0–200 mA (4 µA resolution) or 0–500 mA (10 µA resolution), selectable
• Accuracy: ±0.05% FS (both ranges)
• Compliance voltage: 0–10 V adjustable
• Temperature coefficient: <50 ppm/°C
• Short-term stability (1 hour): <20 ppm
• Long-term stability (24 hour): <40 ppm
• Current noise: 8 V DC
• Control range: −100°C to 199°C
• Temperature sensor compatibility: Thermistor, IC, RTD
• Setpoint resolution: 0.01°C
• Short-term stability (1 hour): ±0.004°C
• Long-term stability (24 hour): ±0.01°C
• Measurement accuracy (calibrated sensor): 0.05°C

– Key Features

• Three operating modes: low-bandwidth constant current (DC to 15 kHz), high-bandwidth constant current (to 1 MHz), constant optical power
• Independent current limiting and slow-start turn-on
• Isolated laser and temperature power supplies
• Fast output shut-off with output shorting relays
• Intermittent contact protection

– Typical Applications

Precision laser characterization, wavelength tuning, optical power stabilization, and modulated laser control in research and production environments.

– Compatibility & Integration

Differential modulation input enables independent ground referencing. Supports thermistor, IC, and RTD temperature sensors for flexible thermal management.