Ultrasensitive Temperature Sensor Based on Fiber-Optic Fabry-Perot Interferometer with Vernier Effect

被引：22
作者：
Yang, Yuqiang [1 ,2 ]
Wang, Yongguang [2 ]
Zhao, Yuxin [2 ]
Jiang, Jiuxing [2 ]
机构：
[1] Harbin Univ Sci & Technol, Higher Educ Key Lab Measuring & Control Technol &, Harbin 150080, Heilongjiang, Peoples R China
[2] Harbin Univ Sci & Technol, Inst Photon & Opt Fiber Technol, Harbin 150080, Heilongjiang, Peoples R China
来源：
JOURNAL OF RUSSIAN LASER RESEARCH | 2019年 / 40卷 / 03期
基金：
中国国家自然科学基金;
关键词：
fiber optic sensor; Fabry-P ' erot interferometer; Vernier effect; temperature sensor; HOLE MICROSTRUCTURED FIBERS; REFRACTIVE-INDEX; SENSITIVITY; GRATINGS; STRAIN;
D O I：
10.1007/s10946-019-09796-2
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose and demonstrate an ultrasensitive temperature sensor based on a fiber-optic Fabry-Perot interferometer (FPI) with the Vernier effect. The sensor is prepared by splicing a section of silica tube and single-mode fiber (SMF) to a section of SMF in sequence, which formed two-cascaded FPIs. Their superimposed spectrum can produce the Vernier effect and form the interference spectrum envelope due to a similar free spectrum range (FSR). The shift of the interference spectrum envelope is much larger than that of a single FPI, when the temperature changes. Experimental results show that the designed sensor can provide a high temperature sensitivity of 183.99 pm/degrees C, which is almost 220 times higher than that of a single air cavity (0.86 pm/degrees C) and about 20 times higher than that of a single silica cavity (9.14 pm/degrees C). The sensor designed has compact structure (< 1 mm) and high sensitivity, providing a prospect for successful applications.
引用
收藏
页码：243 / 248
页数：6
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