High-sensitivity and fast-response fiber-optic micro-thermometer based on a piano-concave Fabry-Perot cavity filled with PDMS

被引：26

作者：

Kong, Ling-Xin ^{[1
]}

Zhang, Yan-Xin ^{[2
]}

Zhang, Wei-Gang ^{[1
]}

Zhang, Yun-Shan ^{[1
]}

Yu, Lin ^{[1
]}

Wang, Song ^{[1
]}

Geng, Peng-Cheng ^{[3
]}

Yan, Tie-Yi ^{[1
]}

机构：

[1] Nankai Univ, Inst Modern Opt, Key Lab Opt Informat Sci & Technol, Minist Educ, Tianjin 300350, Peoples R China

[2] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

[3] China Elect Technol Grp Corp, Inst 46, Tianjin 300220, Peoples R China

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2018年 / 281卷

基金：

中国国家自然科学基金;

关键词：

Optical fiber sensor; Fabry-Perot cavity; Liquid PDMS; Temperature; MODE-FIELD DIAMETER; HOLLOW-CORE FIBER; OPTICAL-FIBER; SENSOR; TEMPERATURE;

D O I：

10.1016/j.sna.2018.09.004

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A high-sensitivity and fast-response fiber-optic micro-thermometer based on a liquid-filling planoconcave Fabry-Perot (FP) cavity was proposed in this paper. The proposed sensor was fabricated by splicing a short section of hollow silica capillary (HSC) on the end of the single mode fiber (SMF). Liquid polydimethylsiloxane (PDMS) was injected from the open end of the HSC, and the air in the HSC was compressed by the PDMS to form a piano-concave air cavity. The open end of the HSC was sealed by a polymethylmethacrylate (PMMA) coating to prevent liquid PDMS leakage. Owing to the high thermal expansion coefficient (TEC) of PDMS, the length of air cavity in the HSC changed with temperature, which caused the dips to move in the reflection spectrum. The total length of the sensing probe was only 120 and a high temperature sensitivity of 1.509 nm/degrees C was obtained in the range of 35 degrees C-45 degrees C. The proposed structure exhibited rapid response time, good repeatability, and biocompatibility in body temperature testing. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：236 / 242

页数：7

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