Title :
Low-loss criterion for fused polarisation-maintaining fibre couplers
Author :
Chiang, Kin Seng
Author_Institution :
CSIRO, Div. of Appl. Phys., Lindfield, NSW, Australia
Abstract :
A simple low-loss criterion for polarisation-maintaining directional couplers made of fused tapered stress-induced birefringent fibres is proposed and used to explain the loss characteristics of some experimental couplers. It is shown that the very low excess loss of some experimental couplers is due to the combined use of index-matched stress-applying regions and a high core-cladding index difference.
Keywords :
directional couplers; light polarisation; optical couplers; optical fibres; optical losses; refractive index; core-cladding index difference; directional couplers; fused tapered fibres; index-matched stress-applying regions; loss characteristics; low-loss criterion; polarisation-maintaining fibre; stress-induced birefringent fibres;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19890689
