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Related Experiment Video

Updated: Aug 16, 2025

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

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 summary is machine-generated.

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.

Keywords:

constant current driver circuit fuzzy PID semiconductor laser system identification temperature control thermoelectric cooler

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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.