一种高稳定度直流半导体激光器驱动电源

Design of a high stability driving power source for semiconductor laser

介绍了一种使用FPGA控制的高稳定度半导体激光器驱动电源的设计,该电源基于Howland电路原理,采用FPGA控制的方法,实现了0~500 mA输出电流控制;输出电流在300 mA时,达到了0.003%的电流稳定度效果;在驱动蝶形封装的1550 nm半导体激光器,输入电流为40 mA时,输出光功率为7.49 mW,且光功率稳定度达到0.33%,对提高半导体激光器输出光功率稳定性具有重要意义。

This paper presents the design of a highly stable semiconductor laser diode driver powered by FPGA.The driver is based on the Howland circuit principle,and the FPGA control method is adopted to realize the output current control of 0-500 mA and the current stability of 0.003%when the output current is 300 mA.When driving a 1550 nm semiconductor laser with a butterfly package,the output optical power reaches 7.49 mW,and the optical power stability reaches 0.33%,which has an important significance for improving the stability of semiconductor laser output optical power.