Highly Sensitive Refractive Index Sensor based on an In-fiber Droplet-shape Air-cavity

Tingting Wang,Fei Wang, Yang Dai,Yixian Ge, Chunxia Kong,Jianhua Chang,Wei Ke,Yanhua Luo,Gang-Ding Peng

IEEE Photonics Technology Letters（2019）

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摘要

We present a highly sensitive refractive index (RI) sensor based on an ultra-compact in-fiber Mach-Zehnder interferometer (MZI) with a droplet-shape air-cavity. The dropletshape air-cavity is fabricated by fusion splicing and single-side fused tapering. The fabricated MZI is with a very short interference arm of ~330μm and the taper waist diameter of ~40μm. The interference happens between the sil...

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关键词

Interference,Temperature measurement,Cavity resonators,Refractive index,Sensitivity,Temperature sensors,Splicing

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