Rigorous analysis of form birefringence of weakly fused fiber-optic couplers
Journal
Journal of Lightwave Technology(SCI)
Journal Volume
13
Journal Issue
4
Pages
687-691
Date Issued
1995-04
Author(s)
H.-C. Chang
Abstract
Based on a rigorous vectorial formulation, the surface integral equation method is used to solve the vectorial mode patterns and the coupling characteristics of weakly fused fiber-optic couplers. Form birefringence versus aspect ratio of the coupler cross-section for different normalized frequencies V are calculated. A dramatic feature—that there is a local maximum of form birefringence for the weakly fused couplers with large V-values—is found. The dependence of the aspect ratio at which the coupler is isotropic on the V-value is also presented. The fused coupler with large V-value is isotropic as the aspect ratio is close to 1.8, but its polarization effect is still significant when the aspect ratio is 2.0. © 1995 IEEE
Type
journal article