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Opt Lett. 1997 May 15;22(10):688-90.

Coupled-mode analysis of fiber-optic add drop filters for dense wavelength-division multiplexing.

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1
California Institute of Technology, 128-95, Pasadena, California 91125, USA.

Abstract

We present a coupled-mode theory of fiber-optic add-drop filters, which involve directional coupling between two fibers combined with fiber Bragg gratings defined inside the coupling region. The analysis self-consistently accounts for both the directional and the reflection coupling, and the propagation constants and structure of the supermodes of the combined structure are derived. We present a detailed analysis of a filter design based on identical fibers. The calculated device parameters satisfy the requirements for dense wavelength-division multiplexing applications.

PMID:
18185629
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