文献类型：期刊文献

英文题名：Highly sensitive fiber-optic temperature sensor with compact hybrid interferometers enhanced by the harmonic Vernier effect

作者：Yang, Wenlong[1];Pan, Rui[1];Zhang, Liuyang[1];Yang, Yuqiang[2];Li, Linjun[3];Yu, Shuang[1];Sun, Xiaoming[1];Yu, Xiaoyang[1]

机构：[1]Harbin Univ Sci & Technol, Heilongjiang Prov Key Lab Laser Spect Technol & Ap, Harbin 150080, Peoples R China;[2]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[3]Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Res Ctr Crystal Mat, Urumqi 830011, Peoples R China

年份：2023

卷号：31

期号：9

起止页码：14570

外文期刊名：OPTICS EXPRESS

收录：SCI-EXPANDED(收录号：WOS:000986456600001)、、EI(收录号：20231914062628)、Scopus(收录号：2-s2.0-85158042643)、WOS

基金：Funding. National Natural Science Foundation of China (51777046) ; Natural Science Foundation for Post-doctoral Scientists of Heilongjiang Province (LBH-Z19070, LBH-Z22193) .

语种：英文

外文关键词：Fabry-Perot interferometers - Fiber optic sensors - Fiber optics - Harmonic analysis - Michelson interferometers - Microchannels - Silicones - Single mode fibers - Temperature sensors - Thermal expansion

外文摘要：A compact fiber-optic temperature sensor with hybrid interferometers enhanced by the harmonic Vernier effect was proposed, which realized 36.9 times sensitization of the sensing Fabry-Perot interferometer (FPI). The hybrid interferometers configuration of the sensor consists of a FPI and a Michelson interferometer. The proposed sensor is fabricated by splicing the hole-assisted suspended-core fiber (HASCF) to the multi-mode fiber fused with the single-mode fiber, and filling polydimethylsiloxane (PDMS) into the air hole of HASCF. The high thermal expansion coefficient of PDMS improves the temperature sensitivity of the FPI. The harmonic Vernier effect eliminates the limitation of the free spectral range on the magnification factor by detecting the intersection response of internal envelopes, and realizes the secondary sensitization of the traditional Vernier effect. Combing the characteristics of HASCF, PDMS, and first-order harmonic Vernier effect, the sensor exhibits a high detection sensitivity of -19.22 nm/degrees C. The proposed sensor provides not only a design scheme for compact fiber-optic sensors, but also a new strategy to enhance the optical Vernier effect.(c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement