激光外差探测中外差信号检测方法研究

为了检测激光外差探测中的微弱信号,分析了激光外差探测原理,提出了采用锁相放大器与采样积分器检测激光外差信号,锁相放大器是利用压缩等效带宽抑制噪声检测周期信号,采样积分器是利用取样和平均化技术测定深埋在噪声中的周期性信号,这2种方法在激光外差信号检测中可大幅度改善信噪比。

Research about the inspection methods of heterodyne signals in the exploration of laser heterodyne

To inspect faint signals in the Exploration of laser heterodyne,this article analyses exploration principles using laser heterodyne,it puts forward to inspect laser signals using and Boxcar integrator.Lock-in amplifier uses compress equivalent bandwidth to restrain noises to inspect periodic signal,Boxcar integrator uses integrate and average technology to explore periodic signal in noises.The two methods can improve signal to noise ratio in the Exploration of laser heterodyne.