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Proceedings Paper

Wavelength demultiplexing by chirped waveguide gratings
Author(s): Eli S. Simova; Mohsen Kavehrad; Krassimir Nedialkov Stoev
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Paper Abstract

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.

Paper Details

Date Published: 1 May 1996
PDF: 9 pages
Proc. SPIE 2690, Wavelength Division Multiplexing Components, (1 May 1996); doi: 10.1117/12.238935
Show Author Affiliations
Eli S. Simova, Univ. of Ottawa (Canada)
Mohsen Kavehrad, Univ. of Ottawa (Canada)
Krassimir Nedialkov Stoev, Institute of Nuclear Research and Nuclear Energy (Bulgaria)

Published in SPIE Proceedings Vol. 2690:
Wavelength Division Multiplexing Components
Louis S. Lome, Editor(s)

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