光纤激光干涉测量技术在EFPI传感器信号解调中的研究进展  

Research Progress on Fiber Optical Laser Interferometry in Signal Demodulation of EFPI Sensor

作　　者：江毅[1] 张树桓 Jiang Yi;Zhang Shuhuan(Key Laboratory of Photonic Information Technology,Ministry of Industry and Information Technology,School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学光电学院信息光子技术工业和信息化部重点实验室,北京100081

出　　处：《激光与光电子学进展》2021年第13期236-248,共13页Laser & Optoelectronics Progress

摘　　要：光纤激光干涉技术是外腔式法布里-珀罗干涉仪(EFPI)传感器动态信号解调的主要技术方案,具有测量灵敏度高、动态范围大、测量频率范围宽等优点。本文从外腔式法布里-珀罗干涉仪相对测量的基本原理出发,回顾了几种主流光纤激光干涉测量技术的解调原理、方法及优缺点,重点介绍了作者课题组提出的几种新型被动解调技术,着力解决现有解调仪仅能测量单一腔长的传感器、直流分量去除、腔长在变化甚至不知道等条件下的信号解调问题。Fiber optical laser interferometry is the main technical scheme for dynamic signal demodulation of external Fabry-Perot interferometer(EFPI) sensors. It has the advantages of high measurement sensitivity, wide dynamic range, and wide measurement frequency range. Based on the measuring principle of an extrinsic FabryPerot interferometric sensor, this article presents the demodulation principles, advantages, and disadvantages of presently used phase recovering technologies, and focuses on several new passive demodulation technologies proposed by the author’s research group, it mainly solves the problems of existing demodulators which can only measure the sensor with a single cavity length, direct current component removal, and signal demodulation when cavity length changes or even unknown.

关 键 词：光纤光学 光纤激光干涉 外腔式法布里-珀罗干涉仪 相位解调 

分 类 号：TN253[电子电信—物理电子学]