Title :
Modes in curved step-index optical fibres
Author :
Gambling, W.A. ; Matsumura, Hiroshi
Author_Institution :
University of Southampton, Department of Electronics, Southampton, UK
Abstract :
By using parabolic, instead of circular, cylindrical co-ordinates the field distributions of the natural modes of curved step-index fibres can be described completely, yet simply. The mode caustics corresponding to the geometrical guiding limit of the equivalent rays of curved fibre can be clearly demonstrated. Near-field mode patterns and caustics obtained experimentally are in excellent agreement with the theory.
Keywords :
optical fibres; optical waveguide theory; curved step index optical fibres; field distributions; geometrical guiding limit; mode caustics; natural modes; near field mode patterns;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19770384
