Temperature control of semi-conductor laser with PID parameter tuning
ZHAO Bin
LI Hao
Abstract：In order to reduce the effect of environment temperature on the output optical power and center wavelength of near-infrared distrubuted feedback (DFB) laser, a temperature control system of DFB laser was designed with the PID control scheme.The PID control system could obtain the optimium point between the dynamic balance setting time and maximium oscillation amplitude through adjusting the proportion (Kp), integration (Ki), differentiation (Kd) parameters with the hardware circuit.The results show that the control precision of temperature control sysytem is ±0.05℃, and the temperature control scope is from 10℃ to 50℃.After longer term supervision, the temperature of DFB laser maintains a very stable status, and the output center wavelength has no drift, which can satisfy the requirements of high detection accuracy for the gas concentration.
Keywords：distributed feedback (DFB)lasertemperature controlresistor temperature detectorthermal electrical controllerPeltier effectPID systememitting spectrumcenter wavelength
Publication Date：2017-07-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 444-448 )