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High-Precision Semiconductor Laser Current Drive and Temperature Control System Design
Yitao Zhao1, Zengguo Tian1, Xiangyu Feng1
1School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China.
Sensors (Basel, Switzerland)
|December 23, 2022
Summary
This study developed a high-precision system to stabilize semiconductor lasers for fiber optic sensing. The system ensures stable drive current and accurate temperature control, improving laser performance.
Area of Science:
- Optoelectronics
- Control Systems Engineering
Background:
- Semiconductor laser output power and wavelength are sensitive to drive current and temperature fluctuations.
- Instability in fiber optic sensing systems impacts measurement accuracy.
Purpose of the Study:
- To develop a high-precision current drive and temperature control system for semiconductor lasers.
- To enhance the stability and safety of laser operation in fiber optic sensing applications.
Main Methods:
- An embedded system with closed-loop negative feedback control for stable drive current.
- Mathematical modeling and M sequence/differential evolution (DE) algorithms for temperature control system identification.
- Fuzzy proportional integral differentiation (PID) algorithm optimization via simulation.
Main Results:
- Achieved a linearly adjustable drive current from 0-100 mA with 0.01 mA accuracy.
- Realized precise temperature control with an accuracy of 0.005 °C.
- Implemented safety features including linear slow-start, current-limiting, and electrostatic protection.
Conclusions:
- The developed system effectively stabilizes semiconductor laser parameters.
- The high-precision control system significantly improves reliability for fiber optic sensing.
- Optimized fuzzy PID control enhances temperature regulation accuracy.
