Asymptotic Coupling Coefficients of Well-separated Single-mode Optical Waveguides |
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| Authors: | Hagen Renner |
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| Affiliation: | 1. Institut für Grundlagen der Elektrotechnik/Elektronik , Technisch Universit?t Dresden , Mommsenstra?e 13, D-O-8027 , Dresden , Germany;2. Arbeitsbereich Optik and Me?technik , Technische Universit?t Hamburg-Harburg , Ei?endorfer Str. 40, D-W-2100 , Hamburg 90 , Germany |
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| Abstract: | Abstract Simple general formulae for the coupling coefficients of the fundamental modes on well-separated parallel optical waveguides are derived. The calculation merely requires accurate knowledge of the propagation constants and core fields of the modes on the individual waveguides, while the far-from-core fields need not be known. Results for coupled circular fibres are identical with the asymptotic expansions of previously derived exact coupling coefficients. Analytical expressions for the coupling coefficients between the fundamental modes on identical weakly guiding channel waveguides are obtained. |
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