半导体激光器驱动电路的设计

Design of driving circuit for semiconductor laser

当前成熟的激光器驱动芯片均为针对数字光输出的数字驱动芯片,无法满足卫星通信、雷达等领域对于宽带模拟激光器驱动的要求。采用蝶形封装分布反馈式激光器组件,通过对自动功率控制(APC)电路、自动温度控制(ATC)电路和工作参数检测电路的改进,设计了适用于模拟激光器的驱动电路。实验结果表明:驱动电路的幅度响应增益均值为2 dB、不平坦度为0.6 dB,输入电压驻波比和输出电压驻波比最大值分别为1.37和1.3。

At present,the mature laser driver chips are all digital driver chops for digital optical output,which cannot meet the driving requirements of broadband analog laser in satellite communication,radar,and other fields.In this paper,the butterfly packaging distributed feedback laser module is used.Through the improvement of automatic power control(APC)circuit,automatic temperature control(ATC)circuit and working parameter detection circuit,a drive circuit suitable for analog laser is designed.The average amplitude response gain of the drive circuit is 2 dB,the roughness is 0.6 dB,and the maximum input voltage standing wave ratio and output input voltage standing wave ratio are 1.37 and 1.3 respectively.