The ILX Lightwave LDC-3752 is a precision laser diode controller integrating a high-stability current source with a 32 W temperature controller for simultaneous management of laser diode current and temperature. Dual output ranges of 2 A or 4 A accommodate various laser diode types, while three control modes—constant current, constant optical power, and high bandwidth—support both DC operation and external analog modulation. The instrument delivers short-term current stability better than 20 ppm, temperature stability within ±0.01°C, and comprehensive laser diode protection. An LCD front panel with keypad provides manual operation; GPIB (IEEE-488) enables remote control.
## Technical Specifications
**Laser Current Source**
• Output current ranges: 2 A / 4 A
• Current control modes: Constant current (CC), constant optical power (CP), high bandwidth mode
• Current accuracy: ±0.1% of set value
• Current ripple: <0.1% of full scale (10 Hz to 1 MHz)
• Short-term stability: <20 ppm
• Compliance voltage: 10 V
• External modulation: Differential analog input supported
**Temperature Controller**
• Integrated TEC power: 32 W
• TEC output current: 4 A
• TEC output voltage: 8 V
• Temperature control range: −100°C to 199°C
• Temperature stability: <±0.01°C
• Temperature resolution: 0.01°C
• Temperature accuracy: ±0.05°C (calibrated sensor) / ±0.1°C (temperature-controlled devices)
• Control modes: Constant temperature, constant sensor, constant TE current
• Supported sensors: Thermistor, IC, RTD
• TEC measurement: Temperature, current, resistance, voltage
**Electrical & Physical**
• Power requirement: 100–240 VAC, 50/60 Hz
• Power consumption: ~100 W
• Weight: 34 lbs
## Key Features
• Dual current ranges for multi-diode compatibility
• Photodiode-based optical power feedback loop
• Differential modulation input for improved laser protection
• Wide temperature range with 0.01°C resolution
• Multiple sensor types accepted (thermistor, IC, RTD)
• GPIB remote interface for automated test sequences
## Typical Applications
• Wavelength-stabilized laser systems requiring tight thermal control
• High-frequency modulation experiments with external RF signal injection
• Multi-laser test benches with varying current and temperature demands
## Compatibility & Integration
The LDC-3752 accepts analog modulation via differential input and supports thermistor, IC, and RTD temperature sensors. GPIB connectivity integrates with automated test platforms and data acquisition systems.
