title: Decoding the spectra of low-finesse extrinsic optical fiber Fabry-Perot interferometers.
abstract: A theoretical model is developed to address the fringe visibility and additional phase in the interference spectra of low-finesse extrinsic optical fiber excited Fabry-Pérot interferometers. The model described in the paper applies to both single-mode and multimode fiber excitations; according to the theory, the fringe visibility and additional phase term are primarily determined by the working wavelength and angular power density distribution outputting from the excitation fiber, rather than based on spatial and temporal degree of coherence. Under certain approximations, the output interference intensity and the spatial power density distribution projected onto the fiber axis form a Fourier-transform pair, which potentially provides a tool for spatial density distribution analysis of fiber output. With excellent agreement with experiments, the theory presented in this paper leads to design guidelines for Fabry-Pérot interferometric sensors and insightful physical understanding of such devices.
authors: Center for Photonics Technology, Bradley department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0111, USA. cma1@vt.edu
authors: Cheng
authors: C
authors: Ma
authors: Bo
authors: B
authors: Dong
authors: Jianmin
authors: J
authors: Gong
authors: Anbo
authors: A
authors: Wang
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000379:methods*