title: Coupled-mode analysis of fiber-optic add drop filters for dense wavelength-division multiplexing.
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.
authors.affiliation: California Institute of Technology, 128-95, Pasadena, California 91125, USA.
authors.forename: S S
authors.initials: SS
authors.lastname: Orlov
authors.forename: A
authors.initials: A
authors.lastname: Yariv
authors.forename: S
authors.initials: S
authors.lastname: Van Essen