In-fibre temperature sensor based on Mach-Zehnder interferometer via dual-mode concentric multilayer-core fibre

Xuran Zhang; Xiao Liang; Zhaoxin Geng; Nan Jia; Pengyu Zhang; Jingcong Li; Zhiming Liu

doi:10.1117/12.2574342

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5 November 2020 In-fibre temperature sensor based on Mach-Zehnder interferometer via dual-mode concentric multilayer-core fibre

Xuran Zhang, Xiao Liang, Zhaoxin Geng, Nan Jia, Pengyu Zhang, Jingcong Li, Zhiming Liu

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Proceedings Volume 11567, AOPC 2020: Optical Sensing and Imaging Technology; 115670C (2020) https://doi.org/10.1117/12.2574342
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

An in-fibre temperature sensor based on a novel dual-mode fibre is proposed and experimentally characterized. The sensor head uses an in-fibre Mach-Zehnder(MZ) structure to sense the surrounding temperature, which depends on the interference spectrums. The concentric multilayer-core fibre (CMCF), in which only two modes could be propagated, would be easier to fabricate an in-fibre MZI with clean spectrum than many fibres, such as multimode fibres, thin-core fibres, PCFs and et al. And low-loss high-strength splice between CMCF and conventional single-mode fibre can be implemented with a commercial fusion splicer. Both the propagation characteristics and operation principle of such a sensor are demonstrated in detail. A sensitivity of ~50.13 pm/°C within temperature range of 30–70 ℃ are experimentally achieved, respectively.

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Xuran Zhang, Xiao Liang, Zhaoxin Geng, Nan Jia, Pengyu Zhang, Jingcong Li, and Zhiming Liu "In-fibre temperature sensor based on Mach-Zehnder interferometer via dual-mode concentric multilayer-core fibre", Proc. SPIE 11567, AOPC 2020: Optical Sensing and Imaging Technology, 115670C (5 November 2020); https://doi.org/10.1117/12.2574342

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