Temperature control system for diode laser based on PID control and genetic-algorithm
XU Juan-juan
CHEN Chen
YANG Hong-jun
Abstract：In order to achieve the accurate control for the temperature of diode laser, a high precision temperature control system combining PID control and genetic algorithm was designed.The temperature value of diode laser was measured and fed back with the thermistor and photodiode in the system.Meanwhile, thermo electric cooler (TEC) was used as the actuator to control the temperature.Therefore, a double close-loop control system was constructed.The method of optimizing PID parameters in an on-line way with genetic algorithm was proposed.According to the real-time measured error, controller output and rising time, a function was established as the performance index to be optimized.And thus, the parameters for the controller could be dynamically adjusted.The results show that the system can achieve the accurate and stabilized temperature control.The stability and temperature error are 0.027％ and 0.002℃, respectively.Furthermore, the control effect is obviously superior to that of traditional PID control.Therefore, the better application value can be obtained.
Keywords：diode lasertemperature controlgenetic algorithmPID controlthermistorphotodiodedouble close-loop control systemoptimization
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 449-453 )