High-performance Bragg gratings in chalcogenide rib waveguides written with a modified Sagnac interferometer
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]
|Collections||ANU Research Publications|
|Source:||Journal of the Optical Society of America B|
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