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Exact coupled-mode theories for multilayer interference coatings with arbitrary strong index modulations. Exakte Theorie der gekoppelten Wellenmoden für mehrschichtige Interferenzfilter mit Brechungsindexgradienten.

Autoren:Matuschek, N.; Kartner, F.-X. ; Keller, U.
Kategorie:Zeitschriften/Aufsätze (reviewed)
Jahr:1997
Veröffentlichung:IEEE Journal of Quantum Electronics, Band 33 (1997) Heft 3, S. 295-302

Abstract

The analysis of multilayered interference coatings by coupled-mode theory is considered to be an approximation useful for small index, gain, and/or loss modulations. In this paper, we show that an exact analysis of a multilayer coating with coupled-mode theory is possible by redefining the coupling and detuning coefficients. We derive the correct coefficients for the case of a Bragg mirror consisting of layers with arbitrary high and low refractive indexes. A detailed comparison with coupled-mode theories using the standard coupling and detuning coefficients is presented.