Title :
Prediction of the ultimate performance of side-tunnel single-polarisation fibre
Author :
Okoshi, Tadashi ; Aihara, Takuma ; Kikuchi, Kazuro
Author_Institution :
University of Tokyo, Department of Electronic Engineering, Tokyo, Japan
Abstract :
As the result of recent progress in polarisation-maintaining optical waveguiding schemes, a basic question now arises: which of stress-induced type or geometrical type approach will finally offer better characteristics? The letter discusses the ultimate performance of a side-tunnel fibre which offers the strongest polarisation-maintaining capability among various geometrical-type ones. The result indicates that, if the structure is optimised, a relative bandwidth of truly single-polarisation characteristics of 0.21 and a normalised birefringence of 0.0045 can be achieved for a relative core-cladding index difference of 0.01. These values are comparable to or higher than the best data reported so far with stress-type ones.
Keywords :
light polarisation; mechanical birefringence; optical fibres; birefringence; geometrical type approach; optical fibre; polarisation-maintaining optical waveguiding schemes; relative bandwidth; relative core-cladding index difference; side-tunnel single-polarisation fibre; single-polarisation characteristics;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830733
