Decoding the spectra of low-finesse extrinsic optical fiber Fabry-Perot interferometers

Cheng Ma, Bo Dong, Jianmin Gong, Anbo Wang
2011 Optics Express  
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
more » ... sed 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. Exact analysis of low-finesse multimode fiber extrinsic Fabry-Perot interferometers," Appl. Opt. 43(24), 4659-4666 (2004). 16. M. Han and A. Wang, "Mode power distribution effect in white-light multimode fiber extrinsic Fabry-Perot interferometric sensor systems," Opt.
doi:10.1364/oe.19.023727 pmid:22109399 fatcat:ivjexbgkbngw3gtpuvosxuyf7u