Advanced Optoelectronic Control Systems

Infrared (IR) and far-infrared (FIR) laser diodes and laser LEDs require highly stable and responsive control electronics to ensure optimal performance across varying thermal and electrical conditions. Our systems integrate:

• High-speed current drivers with low noise and fast transient response for precise modulation of laser output.
• Pulse shaping and modulation circuits for time-resolved spectroscopy and high-speed communication.
• Digital and Analog feedback loops for maintaining wavelength stability and output power in dynamic environments.
• EMI-shielded PCB layouts and thermal isolation techniques to minimize signal degradation in FIR applications.

Monitoring photodiodes are essential for real-time feedback in laser systems. Our control architecture includes:

• Closed-loop feedback systems using transimpedance amplifiers (TIAs) and ADCs for continuous power monitoring.
• PID control algorithms for dynamic adjustment of laser drive current based on photodiode feedback.
• Multi-channel photodiode arrays for beam profiling and spatial intensity mapping.
• Integrated calibration routines to compensate for photodiode aging and temperature drift.

Laser diodes are highly sensitive to temperature fluctuations, which can affect wavelength, efficiency, and lifetime. We implement:

• Thermoelectric coolers (TECs) with precision temperature controllers (PID-based) for maintaining diode junction temperature within ±0.01°C.
• Microfluidic cooling systems for high-power laser arrays, offering scalable thermal management.
• Passive heat sinks and vapor chamber technologies for compact, low-noise applications.
• Real-time thermal monitoring using embedded thermistors and digital temperature sensors.

Fiber laser diodes demand robust control for high-power and high-coherence applications. Our solutions feature:

• Digital signal processors (DSPs) for real-time control of pump diode arrays and seed lasers.
• Wavelength locking mechanisms using fiber Bragg gratings (FBGs) and active feedback.
• Power scaling control via dynamic gain modulation and pump current balancing.
• Integrated safety interlocks and fault detection systems to protect against overdrive, thermal runaway, and optical feedback.