Spatial Frequency Multiplexing of Fiber-Optic Interferometric Refractive Index Sensors Based on Graded-Index Multimode Fibers

被引：18

作者：

Liu, Li ^{[1
]}

Gong, Yuan ^{[1
,2
]}

Wu, Yu ^{[1
]}

Zhao, Tian ^{[1
]}

Wu, Hui-Juan ^{[1
]}

Rao, Yun-Jiang ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Educ Minist China, Key Lab Opt Fiber Sensing & Commun, Chengdu 611731, Sichuan, Peoples R China

[2] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China

来源：

SENSORS | 2012年 / 12卷 / 09期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

fiber-optic sensors; graded-index multimode fiber (GI-MMF); Fabry-Perot sensor; refractive index sensor; spatial frequency multiplexing; FABRY-PEROT SENSOR; TEMPERATURE SENSOR; COMPACT;

D O I：

10.3390/s120912377

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Fiber-optic interferometric sensors based on graded-index multimode fibers have very high refractive-index sensitivity, as we previously demonstrated. In this paper, spatial-frequency multiplexing of this type of fiber-optic refractive index sensors is investigated. It is estimated that multiplexing of more than 10 such sensors is possible. In the multiplexing scheme, one of the sensors is used to investigate the refractive index and temperature responses. The fast Fourier transform (FFT) of the combined reflective spectra is analyzed. The intensity of the FFT spectra is linearly related with the refractive index and is not sensitive to the temperature.

引用

页码：12377 / 12385

页数：9

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