title: In-line fiber optic interferometric sensors in single-mode fibers.
abstract: In-line fiber optic interferometers have attracted intensive attention for their potential sensing applications in refractive index, temperature, pressure and strain measurement, etc. Typical in-line fiber-optic interferometers are of two types: Fabry-Perot interferometers and core-cladding-mode interferometers. It's known that the in-line fiber optic interferometers based on single-mode fibers can exhibit compact structures, easy fabrication and low cost. In this paper, we review two kinds of typical in-line fiber optic interferometers formed in single-mode fibers fabricated with different post-processing techniques. Also, some recently reported specific technologies for fabricating such fiber optic interferometers are presented.
authors.affiliation: Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing 400044, China. zhutao@cqu.edu.cn
authors.forename: Tao
authors.initials: T
authors.lastname: Zhu
authors.forename: Di
authors.initials: D
authors.lastname: Wu
authors.forename: Min
authors.initials: M
authors.lastname: Liu
authors.forename: De-Wen
authors.initials: DW
authors.lastname: Duan
keywords: Fabry-Perot interferometer; Mach-Zehnder Interferometer; Michelson interferometer; core-cladding-mode interferometer; in-line fiber-optic sensor