ILX Lightwave LDC-3752M: 2/4 A Laser Diode Controller

The ILX Lightwave LDC-3752M is a precision laser diode controller combining high-stability current delivery with integrated temperature management. It has dual-range current output (2A/4A), advanced laser protection, and hybrid P-I temperature control from −100°C to 199°C, serving demanding laboratory and production environments requiring simultaneous optical and thermal regulation. ## Technical Specifications Laser Current Source • Dual current ranges: 2A / 4A • Setpoint accuracy: ±0.05% • Setpoint resolution: 40 µA (2A range) / 80 µA (4A range) • Noise and ripple: <10 µA • Short-term stability: <20 ppm • Compliance voltage: 10V • Low bandwidth mode: DC operation with external modulation to 15 kHz • High bandwidth mode: Modulation to 1 MHz for dithering and wavelength tuning • Constant power mode: Rear facet or external photodiode feedback • Analog modulation: Differential input for improved laser protection Temperature Controller • TEC output power: 32W • TEC output current: 4A • TEC output voltage: 8V • Temperature control range: −100°C to 199°C • Temperature stability: ±0.004°C (with calibrated sensor) • Temperature measurement accuracy: ±0.05°C (with calibrated sensor) • Temperature setpoint resolution: 0.01°C • Control loop: Hybrid P-I • Sensor types: Thermistor, IC, RTD • Control modes: Constant temperature, constant sensor, constant TE current ## Key Features • Independent current limits with adjustable threshold • Slow-start turn-on circuitry • Adjustable compliance voltage • Intermittent contact protection • Output shorting relays and semiconductor switch • Isolated laser and temperature control power supplies • Fast output shut-off response • Power line surge and EFT transient protection • Redundant current limit • Temperature sensor or TE module open-circuit shutoff ## Typical Applications • High-precision laser diode characterization • Wavelength-tuned optical systems • Production-line laser module testing • Research and development optical platforms ## Compatibility & Integration Supports thermistor, IC, and RTD temperature sensors. Capable of measuring temperature, current, resistance, and voltage across TEC circuit.