title: Coupled-mode equation of polarization modes of twisted birefringent fibers in a unified coordinate.
abstract: A coupled-mode equation (CME) of twisted birefringent fiber is presented in this paper, which uses the degenerate polarization modes of single-mode fibers as eigenmodes in a unified coordinate. The inconsistency between the coordinate and the rotating principal axis, existing in the previous CME, is solved by conversion to the lab coordinate. The CME gives self-consistent results for fibers with high birefringence or low birefringence and for single-mode fibers as well. Analyses and simulations show the CME gives characteristics of twisted birefringent fiber coincident with the property of polarization-maintaining fibers.
authors: Research Center of Space Laser Information Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. zjfang@siom.ac.cn
authors: Zujie
authors: Z
authors: Fang
authors: Fei
authors: F
authors: Yang
authors: Haiwen
authors: H
authors: Cai
authors: Ronghui
authors: R
authors: Qu