Simple thin-film fiber optic temperature sensor based on Fabry-Perot interference

被引：7
作者：
Chen, Ji-Huan [1 ]
Huang, Xu-Guang [1 ]
Huang, Zhen-Jian [1 ]
机构：
[1] S China Normal Univ, Key Lab Photon Informat Technol, Guangdong Higher Educ Inst, Guangzhou 510006, Peoples R China
来源：
OPTICAL ENGINEERING | 2010年 / 49卷 / 04期
关键词：
fiber sensor; interference; temperature; thin film; wavelength shift;
D O I：
10.1117/1.3407460
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A simple fiber optic temperature sensor with a micro Fabry-Perot cavity constructed with a thin film coated on a fiber end is presented. Its operation principle is based on the temperature-dependent wavelength shift of the interference fringes formed by Fresnel reflections from both interfaces of the thin film. An analytical formula is derived from the theory of two-beam interference. Experimental temperature data agree with the theoretical result. A temperature resolution of 0.1 K within the range from 20 to 100 degrees C with good stability can be achieved. The proposed temperature sensor has a simple, solid, and compact structure. (c) 2010 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3407460]
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页数：4
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