基于光放大的光纤Fizeau应变传感器频分复用系统  

Frequency-multiplexed fiber-optic Fizeau strain sensor system based on optical amplification

作　　者：江建[1] 饶云江[1] 周昌学[1] 朱涛[1] 

机构地区：[1]重庆大学光电工程学院,重庆400044

出　　处：《物理学报》2004年第7期2221-2225,共5页Acta Physica Sinica

基　　金：国家杰出青年基金 (批准号 :60 0 2 5 5 15 )资助的课题~~

摘　　要：提出了一种可频分复用基于光放大的光纤Fizeau应变传感器的方法 ,从原理上解决了现有光纤Fabry Perot传感器固有的两大弱点 :信号弱和复用难 .利用掺铒光纤的放大作用 ,既形成宽带光源 ,又放大了微弱的信号 .描述了该应变传感器系统的结构、原理及实验结果 .实验表明该复用传感器应变测量精度可达± 10 με,可满足实际应用的要求 .A novel method for multiplexing fiber-optic Fizeau strain sensors based on optical amplification is proposed and demonstrated for the first time to our knowledge. This method overcomes the two intrinsic disadvantages of fiber-optic Fabry-Perot strain sensors, i.e. weak signal and difficult multiplexing. Also, the amplified spontaneous emission and optical amplification of the Erbium-doped fiber pumped by a 980nm laser diode are used simultaneously. The structure, principle and experimental results of the sensor system are described in this paper. A strain accuracy of ～±10με has been achieved, which can meet the practical requirement.

关 键 词：光纤传感器 光纤应变传感器 掺铒光纤 频分复用系统 传感器结构 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]