Ultrasensitive Mach-Zehnder Interferometric Temperature Sensor Based on Liquid-Filled D-Shaped Fiber Cavity

被引：27

作者：

Zhang, Hui ^{[1
]}

Gao, Shecheng ^{[2
]}

Luo, Yunhan ^{[3
]}

Chen, Zhenshi ^{[4
]}

Xiong, Songsong ^{[5
,6
]}

Wan, Lei ^{[2
]}

Huang, Xincheng ^{[2
]}

Huang, Bingsen ^{[2
]}

Feng, Yuanhua ^{[2
]}

He, Miao ^{[1
]}

Liu, Weiping ^{[2
]}

Chen, Zhe ^{[3
]}

Li, Zhaohui ^{[5
,6
]}

机构：

[1] Guangdong Univ Technol, Sch Phys & Optoelect Engn, Guangzhou 510006, Guangdong, Peoples R China

[2] Jinan Univ, Dept Elect Engn, Coll Informat Sci & Technol, Guangzhou 510632, Guangdong, Peoples R China

[3] Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Guangdong, Peoples R China

[4] Jinan Univ, Inst Photon Technol, Guangzhou 510632, Guangdong, Peoples R China

[5] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China

[6] Sun Yat Sen Univ, Sch Elect & Informat Technol, Guangzhou 510275, Guangdong, Peoples R China

来源：

SENSORS | 2018年 / 18卷 / 04期

基金：

中国国家自然科学基金;

关键词：

micro-optical devices; fiber optics sensors; thermal effects; PHOTONIC CRYSTAL FIBER; REFRACTIVE-INDEX; HIGH-SENSITIVITY; STRAIN; RESONANCE; GRATINGS; AIR;

D O I：

10.3390/s18041239

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A liquid-filled D-shaped fiber (DF) cavity serving as an in-fiber Mach-Zehnder interferometer (MZI) has been proposed and experimentally demonstrated for temperature sensing with ultrahigh sensitivity. The miniature MZI is constructed by splicing a segment of DF between two single-mode fibers (SMFs) to form a microcavity (MC) for filling and replacement of various refractive index (RI) liquids. By adjusting the effective RI difference between the DF and MC (the two interference arms), experimental and calculated results indicate that the interference spectra show different degrees of temperature dependence. As the effective RI of the liquid-filled MC approaches that of the DF, temperature sensitivity up to 84.72 nm/degrees C with a linear correlation coefficient of 0.9953 has been experimentally achieved for a device with the MC length of 456 mu m, filled with liquid RI of 1.482. Apart from ultrahigh sensitivity, the proposed MCMZI device possesses additional advantages of its miniature size and simple configuration; these features make it promising and competitive in various temperature sensing applications, such as consumer electronics, biological treatments, and medical diagnosis.

引用

页数：13

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