采用全光纤结构进行相干探测,使用输出功率100 mW窄线宽激光作发射源,利用多普勒效应,可对0.1 m～3km目标进行测速.该系统探测灵敏度可达10-13 W,具有功耗小、环境适应性好、可靠性高等优点,适用于飞船着陆器安全软着陆等应用.%An all fiber coherent detection system is developed for target velocity measurement. The narrow line width laser output power is 100 mW. It's based on Doppler etfect. The operation distance is from 0. 1 m to 3 km. The system's sensitivity achieves 10 W,It has advantage of low power consumption,stable and reliable performance, good spatial adaptability. The system can be used for spacecraft landing which needs to measure velocity.
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