Real-time observation of Bragg grating formation in As2S3 chalcogenide ridge waveguides |
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| Authors: | R al Vall e, Simon Fr d rick, Karen Asatryan, Michel Fischer,Tigran Galstian |
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| Affiliation: | Centre d’optique, Photonique et Laser, Université Laval, Pav. Alexandre-Vachon, Québec, Canada G1K 7P4 |
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| Abstract: | Real-time study of the formation of Bragg gratings in monolayer As2S3 ridge waveguides is presented. A transverse holographic method is used to record such gratings. The periodic photodarkening of the layer leads to the formation of a Bragg grating with resonant wavelength 1.55 μm. The experiment allowed to control in situ the grating parameters such as the reflectivity, the resonant wavelength (between 1500 and 1630 nm) and the bandpass at −3 dB. |
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| Keywords: | Bragg gratings Channel waveguides Chalcogenide glasses Photosensitivity |
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