Design of tunable semiconductor laser driver and temperature control circuit based on WMS
A miniaturized semiconductor laser driver and temperature control circuit based on STM32F407 micro-controller combined with FPGA is designed to address the issue of the wavelength and power output of tunable semicon-ductor lasers being unable to remain constant due to fluctuations in their operating current and temperature.By interac-ting with the host computer,the system can achieve continuous adjustment of the laser driving current and operating temperature,ensuring that the wavelength of the output light of the semiconductor laser is within the optimal range.Af-ter testing,the current stability of the drive module of the system is 0.075％,and the average relative error between the actual and theoretical values of the current is 0.538％;The stability of the temperature circuit is 0.03 ℃,fully meeting the practical application requirements.
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