Cutoff wavelengths of guided modes in optical fibres with square-law core profile
- 27 November 1975
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 11 (24) , 602-603
- https://doi.org/10.1049/el:19750459
Abstract
A simple formula has been derived by means of a perturbation approach, yielding the cutoff υ-values in an optical fibre with parabolic index profile in the core, and uniform cladding. The corresponding count of propagating modes matches well with the law υ1/4, predicted by previous theories.Keywords
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