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本文介绍一种新型激光多普勒测速仪——光电调制反馈激光多普勒测速仪(简称OEMF-LDA)。该仪器突破了传统LDA系统构成的模式,采用变频光学频移技术和光电混合反馈技术,将光路和电路连接成闭环负反馈跟踪环路,提高了信噪比,降低了成本。文中结合实验,讨论了OEMF-LDA的静态及动态特性,并在系统的结构及性能等方面与传统LDA作了比较。
This article describes a new type of laser Doppler velocimeter - photoelectric modulation feedback laser Doppler velocimeter (OEMF-LDA). The instrument breaks through the traditional LDA system and adopts the frequency shift optical frequency shift technology and optical hybrid feedback technology to connect the optical circuit and the circuit into a closed loop negative feedback tracking loop to improve the signal to noise ratio and reduce the cost. In this paper, the static and dynamic characteristics of OEMF-LDA are discussed and compared with the traditional LDA in terms of system structure and performance.