Abstract

We demonstrate an all-fiber optical Fabry–Perot interferometer (FPI) strain sensor whose cavity is a microscopic air bubble. The bubble is formed by fusion splicing together two sections of single-mode fibers (SMFs) with cleaved flat tip and arc fusion induced hemispherical tip, respectively. The fabricated interferometers are with bubble diameters of typically $\sim 100\mathrm{\mu m}$. Strain and temperature sensitivities of fabricated interferometers are studied experimentally; a strain sensitivity of over $4\mathrm{Pm}/\mathrm{\mu \epsilon }$ and a thermal sensitivity of less than $0.9\mathrm{Pm}/°\mathrm{C}$ is obtained.

©2012 Optical Society of America

Spheroidal Fabry-Perot microcavities in optical fibers for high-sensitivity sensing

F. C. Favero, L. Araujo, G. Bouwmans, V. Finazzi, J. Villatoro, and V. Pruneri
Opt. Express 20(7) 7112-7118 (2012)

Temperature-insensitive fiber optic Fabry-Perot interferometer based on special air cavity for transverse load and strain measurements

Yongfeng Wu, Yundong Zhang, Jing Wu, and Ping Yuan
Opt. Express 25(8) 9443-9448 (2017)

High sensitivity gas refractometer based on all-fiber open-cavity Fabry–Perot interferometer formed by large lateral offset splicing

De-wen Duan, Yun-jiang Rao, and Tao Zhu
J. Opt. Soc. Am. B 29(5) 912-915 (2012)

Strain sensor based on gourd-shaped single-mode-multimode-single-mode hybrid optical fibre structure

Ke Tian, Gerald Farrell, Xianfan Wang, Wenlei Yang, Yifan Xin, Haidong Liang, Elfed Lewis, and Pengfei Wang
Opt. Express 25(16) 18885-18896 (2017)

Sapphire derived fiber based Fabry-Perot interferometer with an etched micro air cavity for strain measurement at high temperatures

Penghao Zhang, Li Zhang, Zhongyu Wang, Xinying Zhang, and Zhendong Shang
Opt. Express 27(19) 27112-27123 (2019)