Fabry-Perot cavity cascaded sagnac loops for temperature and strain measurements

被引：3
作者：
Shangguan, Chunmei [1 ,2 ,3 ]
Zhang, Wen [1 ,2 ,3 ]
Hei, Wei [1 ,2 ,3 ]
Luo, Fei [1 ,2 ,3 ]
Zhu, Lianqing [1 ,2 ,3 ]
机构：
[1] Beijing Informat Sci & Technol Univ, Beijing Engn Res Ctr Optoelect Informat & Instrum, Beijing, Peoples R China
[2] Minist Educ, Key Lab Modern Measurement Control Technol, Beijing, Peoples R China
[3] Beijing Informat Sci & Technol Univ, Beijing Key Lab Optoelect Test Technol, Beijing, Peoples R China
来源：
OPTICAL ENGINEERING | 2018年 / 57卷 / 04期
关键词：
chemical etched; Fabry-Perot cavity; sagnac loops; temperature; strain;
D O I：
10.1117/1.OE.57.4.047103
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The fabrication process and temperature and strain characterizations of an all-fiber sensor are presented. The sensing structure based on a Fabry-Perot cavity (FPC) and sagnac loops was proposed and experimentally demonstrated for measurements of temperature and strain. The FPC consists of a micro-piece of chemical etched multimode fiber end face, welded with another single mode fiber. Then, the sagnac loops composed of polarization maintaining fiber was connected to the FPC. The sensor was fabricated and tested for temperature and strain. Experimental results show that sensitivity of temperature and strain is 0.71 +/- 0.03 nm/degrees C and 1.30 +/- 0.01 pm/mu epsilon, respectively; the linearity are 0.9970 and 0.9996, respectively. (C)2018society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：5
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