腔长损耗对非本征F-P腔光纤传感器的影响  

Effect of cavity length loss on fiber-optic sensor based on extrinsic Fabry-Perot cavity

作　　者：吕涛[1] 杜秋姣[1] 毕洁[1] 向东[1] 

机构地区：[1]中国地质大学数理学院,湖北武汉430074

出　　处：《光电工程》2007年第8期130-133,共4页Opto-Electronic Engineering

基　　金：中国地质大学(武汉)优秀青年教师资助计划资助项目(CUGQNL0614)

摘　　要：根据光学法布里-珀罗(F-P)腔基本原理,运用单模光纤能量散射模型分析了腔长损耗对非本征F-P腔输出光强度的影响。实验过程中所用的F-P腔由单模光纤端面和弹性硅片组成。实验结果表明,非本征F-P腔输出光强幅度随腔长增大逐渐衰减,其输出特性曲线中不同部分相同周期的线性工作区间却对应不同的测量量程和灵敏度,所以强度型光纤F-P腔传感器初始腔长应基于传感器的性能指标进行选取。According to the fundamental principle of Fabry-Perot （F-P） cavity, the effect of cavity length loss on output intensity of extrinsic F-P cavity is analyzed by using single-mode fiber power distribution-based model. The F-P cavity applied in experiment is made up of single mode fiber end and elastic silicon slice. The experimental results indicate that output intensity of extrinsic F-P cavity attenuates gradually with the increase of cavity length, and the same periodically linear region in different segments of output characteristic curve corresponds with different measurement ranges and sensitivities. Based on the sensor performance indexes, the original cavity length of intensity-type optical fiber F-P cavity sensor can be selected.

关 键 词：光纤传感器 法布里-珀罗腔 腔长损耗 输出强度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]