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Low-reflection photonic-crystal taper for efficient coupling between guide sections of arbitrary widths

We design and fabricate a new taper structure for adiabatic mode transformation in two-dimensional photonic-crystal waveguides patterned into a GaInAsP confining layer. The taper efficiency is validated by measurement of a reduction of the reflection between an access ridge and a photonic-crystal gu...

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Bibliographic Details
Published in:Optics letters 2002-09, Vol.27 (17), p.1522-1524
Main Authors: Talneau, A, Lalanne, Ph, Agio, M, Soukoulis, C M
Format: Article
Language:English
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Summary:We design and fabricate a new taper structure for adiabatic mode transformation in two-dimensional photonic-crystal waveguides patterned into a GaInAsP confining layer. The taper efficiency is validated by measurement of a reduction of the reflection between an access ridge and a photonic-crystal guide with one missing row from 6% to less than 1%. This taper is then incorporated into a 60 degrees bend; simulations demonstrate a 90% transmission between multimode ports.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.27.001522