Title :
Leaky rays cause failure of geometric optics on optical fibres
Author :
Snyder, A.W. ; Mitchell, D.J.
Author_Institution :
Australian National University, Institute of Advanced Studies, Department of Applied Mathematics, Canberra, Australia
Abstract :
Many of the rays on circular optical fibres that are predicted from geometric optics to be trapped by total internal reflection are, in fact, leaky. Thus geometric optics fails for long fibres. The letter presents a concise analytic expression for the loss of all weakly attenuating rays. The method is simple, and applicable to a large class of problems. The results provide a unifying theory of light transmission within fibres, representing a generalisation of Fresnel´s and Snell´s laws.
Keywords :
fibre optics; geometrical optics; optical waveguides; failure; fibre optics; geometrical optics; leaky rays; loss; optical waveguides; total internal reflection;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19730319
