Effective-index method and coupled-mode theory for almost-periodic waveguide gratings: a comparison

1992/02/20 by Kim A. Winick
Engineering · Materials Science · #Photonic and Optical Devices #Optical Coatings and Gratings #Advanced Fiber Optic Sensors

paper · doi:10.1364/ao.31.000757

Abstract

Contradirectional propagation through active, first-order, almost-periodic, corrugated waveguide gratings is analyzed by using both coupled-mode theory and a combined effective-index/impedance-matching matrix technique. For TE-mode operation, which is near the first-order Bragg wavelength, the equivalence of the two techniques is analytically demonstrated for shallow surface corrugations.

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