摘要
光纤法布里-珀罗传感器以灵敏度高、抗干扰能力强等优点在医疗检测、水声探测、电力监测等领域受到了广泛的关注。光源参数、传感头结构与解调方法是制约光纤法布里-珀罗传感器检测能力的主要因素。对光纤法布里-珀罗传感器解调,即从携带法布里-珀罗传感器腔长信息的输出光信号中提取腔长信息。该腔长信息映射出了传感头所感受到的振动、位移、加速度、温度等待测量信息。一种好的解调方法能够提高光纤法布里珀罗传感器的解调速度、分辨率、动态范围等性能,而光纤法布里-珀罗传感器的解调方法多达数十种,针对特定的应用场景如何选择适宜的解调方法往往令人困扰。本文首先介绍了光纤法布里-珀罗传感器的输出信号特征,然后从原理上详述了常见解调方法的影响因素,并介绍了国内外研究单位提出的多种改进方法,最后从解调方法的适用范围及光纤法布里-珀罗传感器的复用技术两方面出发,提出了解调方法的选取原则。
Fiber optic Fabry-Perot sensors have attracted a lot of attention in many fields such as medical detection,underwater acoustic detection,and electric power monitoring due to their high sensitivity and strong anti-interference ability.The parameters of the light source,the structure of the sensing head,and the demodulation methods are the main factors that restrict the detection ability of fiber optic Fabry-Perot sensors.Demodulating the fiber optic Fabry-Perot sensors is to extract cavity length from the output optical signal which indicates the information of vibration,displacement,acceleration,temperature,and other parameters sensed by the sensor's head.An excellent demodulation method can improve the demodulation speed,resolution,and dynamic range of the fiber optic Fabry-Perot sensor.However,there are dozens of demodulation methods for the fiber optic Fabry-Perot sensor,and it is difficult to choose the appropriate demodulation method for specific application scenarios.In this paper,firstly,the characteristics of the signal output from the optical fiber Fabry-Perot sensor are reviewed.Then,the influencing factors of the common demodulation methods are described in detail,and the improvement methods proposed by domestic and foreign research institutes are also introduced.Finally,the choice principle of the demodulation is proposed from two aspects:the applicable condition and the multiplexing of the optical fiber Fabry-Perot sensor.
作者
周朕蕊
邱宗甲
李康
张国强
Zhou Zhenrui;Qiu Zongjia;Li Kang;Zhang Guoqiang(Institute of Electrical Engineering,Chinese Academic of Sciences,Beijing 100190,China;University of Chinese Academic of Sciences,Beijing 100049,China)
出处
《光电工程》
CAS
CSCD
北大核心
2022年第6期1-19,共19页
Opto-Electronic Engineering
基金
中国科学院电工所科研基金资助项目(E155440201)
中国科学院青年创新促进会资助项目(2021135)。
关键词
法布里-珀罗传感器
解调方法
复用
方法选择
Fabry-Perot sensor
demodulation methods
multiplexing
method selection
