1 May 1996 Wavelength demultiplexing by chirped waveguide gratings
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The spectral response of a chirped sinusoidal surface relief grating in an optical waveguide has been studied by means of Local Normal Mode Expansion theory. A matrix technique has been applied to account for the varying grating period. The grating is divided into segments with constant periods and coupling coefficients. Nonslanted grating is considered in a first-order diffraction. Also, contradirectional coupling between guided modes in phase synchronism at an arbitrary angle of incidence is considered. Performance considerations include TE-TE, TE- TM, and TM-TM mode coupling for different grating geometry and waveguide parameters. We show the effect of geometry and waveguide parameters on the performance of the chirped grating as a wavelength demultiplexer. Also, we demonstrate how the filtering and demultiplexing characteristics and the spectral shift between different polarization modes can be controlled.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eli S. Simova, Mohsen Kavehrad, Krassimir Nedialkov Stoev, "Wavelength demultiplexing by chirped waveguide gratings", Proc. SPIE 2690, Wavelength Division Multiplexing Components, (1 May 1996); doi: 10.1117/12.238935; https://doi.org/10.1117/12.238935

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