【摘要】 针对传统激光器调制系统结构复杂、调制频率低、调制带宽窄等缺点,设计了一种半导体激光器高频调制系统。分析了影响半导体激光器调制带宽的因素,设计匹配补偿电路使半导体激光器的调制带宽增加了3倍以上,该系统可实现对半导体激光器DC~150 MHz范围内各频点的强度调制,并能实现频率的快速切换,各频点频率分辨率为0.1164 Hz,频率漂移均小于1 Hz,相对漂移均小于1×10-6,同时还为后续差频测相提供高稳定的本振信号。更多还原

【Abstract】 A high frequency laser diode modulation system was designed,it overcame the shortcomings of the traditional modulation system such as complex structure,low modulation frequency and narrow frequency band.The factors that limited the laser diode modulation frequency band was analyzed;a set of matching circuits was designed and the modulation frequency band was enlarged 3 times.The system can accomplish amplitude modulation of laser diode from DC to 150 MHz,and the frequency switch is very fast.The frequency resolving power is 0.116 4 Hz,the frequency drift is less than 1 Hz and the relative drift is less than 10-6.The local oscillator signal with high stability is provided to facilitate the phase measurement.更多还原