title: Bending effect on fiber acousto-optic mode coupling.
abstract: The acousto-optic effect in a bent fiber is studied experimentally and numerically by using the scalar finite-element method. The resulting transmission spectra show that new mode-coupling peaks appear due to the breaking of the mode spatial symmetry. The strength of new peaks increases as the fiber-bending curvature increases with a redshift or blueshift in wavelength, strongly depending on the orientation of fiber bending with respect to the acoustic-wave vibration direction.
authors.affiliation: Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. zhaojh01@mails.tsinghua.edu.cn
authors.forename: Jianhui
authors.initials: J
authors.lastname: Zhao
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Ye
authors.initials: Y
authors.lastname: Luo
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008962:Models, Theoretical; D012542:Scattering, Radiation