The ILX Lightwave LDC-3910 is a modular laser diode controller that delivers precision current and temperature management for laser diode characterization and deployment. Its rear-loading module architecture supports user-configurable, interchangeable current source, thermoelectric (TE), and combination modules, scaling from single-channel to 4-channel configurations with up to 8 isolated outputs. The system combines low-noise current delivery, temperature stability better than 0.005°C, and integrated laser diode protection for research, communications, and production environments.
Technical Specifications
Current Source Modules:
• Laser current output: 200 mA to 8 A
• Operating modes: Constant current (CC) and constant power (CP)
• Analog modulation: Up to 500 kHz for wavelength tuning
• Protection: Independent current limits and shorting relays
• Monitor photodiode circuitry for back-facet monitoring
Thermoelectric (TE) Controller Modules:
• TE power output: Up to 32 W
• Temperature stability: Better than 0.005°C
• Temperature sensor compatibility: Thermistors, IC sensors, RTDs
• Operating modes: Constant temperature or constant resistance
• Control loop: Smart integrator with programmable parameters (front panel or GPIB)
• Includes TE voltage measurement
Combination Modules (Current Source + TE Controller):
• Laser current: 200 mA to 2 A
• Integrated TE controller: 12 W
Mainframe Architecture:
• Modular bay design: Accommodates up to 4 channels
• Isolated outputs: Up to 8 available
• Rear-loading module bays for tool-free reconfiguration
– Key Features
• Low-noise, high-stability current delivery across extended operating ranges
• Independent current limiting and laser diode shorting relays prevent catastrophic device failure
• Smart integrator control loop enables fast settling times with GPIB programmability
• Flexible module ecosystem allows application-specific configuration without mainframe replacement
– Typical Applications
• Laser diode research and development
• Fiber optic communications testing and characterization
• Wavelength tuning and dithering via analog modulation
• Temperature-stabilized laser systems requiring sub-millidegree precision
– Compatibility & Integration
Front panel and GPIB control interfaces enable integration into automated test systems. Multiple temperature sensor types—thermistors, IC sensors, and RTDs—accommodate a broad range of laser diode packaging and thermal management approaches.
