单模螺旋光纤的本地场

应用科学学报 ›› 1995, Vol. 13 ›› Issue (2): 184-188.

单模螺旋光纤的本地场

陈冠三

上海大学嘉定校区

收稿日期:1993-05-31 修回日期:1993-11-05 出版日期:1995-06-30 发布日期:1995-06-30

LOCAL FIELD IN A SINGLE -MODE HELICAL FIBER

CHEN GUANSAN

Shanghai University, Jiading Campus

Received:1993-05-31 Revised:1993-11-05 Online:1995-06-30 Published:1995-06-30

摘要/Abstract

摘要： 该文从波动方程出发,直接在本地坐标系(Serret-Frenet框架)中求解单模阶跃型折射率分布的圆形芯弱导螺旋光纤,应用微扰分析法得到了基模场分布和传播常数的解析表达式。结果表明:(1)单模螺旋光纤的基模是右旋和左旋圆偏振模;(2)螺旋光纤基模间的传播常数之差为2τ。这两个理论结果和已知的实验结果一致。

关键词: 非正交坐标系, 螺旋光纤, 圆偏振模

Abstract: Based on the wave equation,we directly analyse a single-mode helical fiber with a circular cross section and step profile of the refractive index in the local coordinate system. Withe the perturbation method,the analytical expressions of the fundamental mode field and the propagation constant are given,Two results are brought about:(1) the fundamental modes in a single-mode helical fiber are right-rotated and left-rotated circularly polarised modes. (2) the difference of propagation constants between the two modes iS 2τ.The theoretical results agree with those of the known experimental measurements.

Key words: circularly polarised modes, nonorthogonal coordinate system, helical fiber

陈冠三. 单模螺旋光纤的本地场[J]. 应用科学学报, 1995, 13(2): 184-188.

CHEN GUANSAN. LOCAL FIELD IN A SINGLE -MODE HELICAL FIBER[J]. Journal of Applied Sciences, 1995, 13(2): 184-188.