title: Single S-tapered fiber Mach-Zehnder interferometers.
abstract: A fiber Mach-Zehnder interferometer (MZI) sensor, novel to our knowledge, based on a single "S"-like fiber taper has been fabricated via applying nonaxial pull in fiber tapering by a fusion splicer. The typical feature size of the structure has a length of 660 μm and the axial offset of 96 μm. This S fiber taper MZI has a refractive index (RI) sensitivity of 1590 nm/refractive index unit in the RI range of 1.409-1.425 and a strain sensitivity of about -60 pm/microstrain, which is 30 times higher than that of the normal two-taper-based MZI sensors.
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Yang
authors.forename: Yong-Sen
authors.initials: YS
authors.lastname: Yu
authors.forename: Yang
authors.initials: Y
authors.lastname: Xue
authors.forename: Chao
authors.initials: C
authors.lastname: Chen
authors.forename: Qi-Dai
authors.initials: QD
authors.lastname: Chen
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Sun