title: Microbubble based fiber-optic Fabry-Perot interferometer formed by fusion splicing single-mode fibers for strain measurement.
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 ~100 μm. Strain and temperature sensitivities of fabricated interferometers are studied experimentally; a strain sensitivity of over 4 Pm/με and a thermal sensitivity of less than 0.9 Pm/°C is obtained.
authors.affiliation: Key Laboratory of Optoelectronic Technology and Systems (Education Ministry of China), Chongqing University, Chongqing 400044, China.
authors.forename: De-Wen
authors.initials: DW
authors.lastname: Duan
authors.forename: Yun-jiang
authors.initials: YJ
authors.lastname: Rao
authors.forename: Yu-Song
authors.initials: YS
authors.lastname: Hou
authors.forename: Tao
authors.initials: T
authors.lastname: Zhu