Title :
Perturbation theory for the evaluation of the normalised cutoff frequencies in radially inhomogeneous fibres
Author :
Meunier, J.P. ; Pigeon, J. ; Massot, J.N.
Author_Institution :
Université de Saint-Etienne, UER de Sciences, Laboratoire Traitement du Signal et Instrumentation , Faculté des Sciences, Saint Etienne, France
Abstract :
A simple perturbation theory has been used to study the normalised cutoff frequencies of radially inhomogeneous fibres. The formalism has been developed with a truncated parabolic-index profile as zero-order solution. Numerical calculations have been carried out for ¿-profiles and have been found to be in good agreement with more rigorous approaches reported by previous authors.
Keywords :
optical fibres; optical waveguides; perturbation theory; graded index fibres; normalised cutoff frequencies; optical fibres; optical waveguide theory; perturbation theory; radially inhomogeneous fibres;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19800023
