Title :
Directional-coupler filter using dissimilar optical fibres
Author_Institution :
AT&T Bell Laboratories, Crawford Hill Laboratory, Holmdel, USA
Abstract :
The letter discusses the filter bandwidths achievable with directional couplers composed of two dissimilar optical fibres. One fibre always has a step-index core while the other may be either a step-index fibre or a graded-index fibre whose core has a parabolic, triangular or cusp-shaped refractive-index distribution.
Keywords :
directional couplers; optical couplers; optical fibres; optical filters; directional coupler filter; dissimilar optical fibres; filter bandwidths; graded-index fibre; refractive index distribution; step index core; step index fibre;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850512
