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High-performance Bragg gratings in chalcogenide rib waveguides written with a modified Sagnac interferometer

Shokooh-Saremi, Mehrdad; Ta'eed, Vahid G; Baker, Neil J; Littler, Ian C. M; Moss, David J; Eggleton, Benjamin J; Ruan, Yinlan; Luther-Davies, Barry


We demonstrate the highest-quality Bragg gratings reported to date in chalcogenide glass rib waveguides, both in strength and apodization. A modified Sagnac interferometer is employed to write gratings in As2S3-based rib waveguides, achieving an induced refractive index modulation of the order of 10−2 and a grating transmission rejection of more than 30 dB. We obtain good agreement between experimental and theoretical results based on a transfer-matrix formulation for multilayer optical...[Show more]

CollectionsANU Research Publications
Date published: 2006-07
Type: Journal article
Source: Journal of the Optical Society of America B
DOI: 10.1364/JOSAB.23.001323


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