干涉测量
材料科学
光学
法布里-珀罗干涉仪
双折射
灵敏度(控制系统)
折射率
光电子学
光纤传感器
波长
光纤
物理
电子工程
工程类
作者
Feiru Wang,Yongjun Liu,Yuelan Lu,Lingli Zhang,Ji Ma,Lei Wang,Weimin Sun
出处
期刊:Optics Letters
[The Optical Society]
日期:2018-10-25
卷期号:43 (21): 5355-5355
被引量:59
摘要
A novel high-sensitivity Fabry–Perot (FP) interferometer temperature sensor based on liquid crystals (LCs) and the Vernier effect is proposed and demonstrated in this Letter. This sensor is prepared by inserting two cleaved single-mode fibers into a section of a capillary tube to generate an FP cavity. The cavity is filled with LCs, which induces a Vernier effect due to the birefringence of LCs. The refractive indices of the ordinary and extraordinary light have different responses to the temperature changes. As a result, the temperature sensitivity is significantly improved by detecting the peak shifts of a periodic envelope. The experimental results show that the proposed sensor can provide a high-temperature sensitivity of 19.55 nm/°C. This sensor offers key features and advantages of the Fabry–Perot interferometer, including low cost and good fringe visibility. Furthermore, such a sensor probe can meet different requirements of temperature sensing in various application areas by using different kinds of LCs.
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