Sampled Bragg gratings in chalcogenide (As(2)S(3)) rib-waveguides

Sampled Bragg gratings in chalcogenide (As(2)S(3)) rib-waveguides

We have written a sampled Bragg grating into a highly photosensitive chalcogenide (As(2)S(3)) rib-waveguide using a scanning Sagnac interferometer. The grating exhibits evenly spaced rejection peaks over a 40 nm bandwidth. We estimate the induced refractive index change of the waveguide to be over 0...

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Veröffentlicht in:Optics express 2006-10, Vol.14 (20), p.9451-9459
Hauptverfasser: Baker, Neil J, Lee, Ho W, Littler, Ian C, de Sterke, C Martijn, Eggleton, Benjamin J, Choi, Duk-Yong, Madden, Steve, Luther-Davies, Barry
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container_end_page 9459
container_issue 20
container_start_page 9451
container_title Optics express
container_volume 14
creator Baker, Neil J
Lee, Ho W
Littler, Ian C
de Sterke, C Martijn
Eggleton, Benjamin J
Choi, Duk-Yong
Madden, Steve
Luther-Davies, Barry
description We have written a sampled Bragg grating into a highly photosensitive chalcogenide (As(2)S(3)) rib-waveguide using a scanning Sagnac interferometer. The grating exhibits evenly spaced rejection peaks over a 40 nm bandwidth. We estimate the induced refractive index change of the waveguide to be over 0.03 by matching the measured spectrum to numerical solutions of the coupled mode equations while accounting for an induced chirp. The sampled Bragg grating presented is comparable in strength and bandwidth to the best sampled Bragg gratings obtained to date in silica optical fibre.
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title Sampled Bragg gratings in chalcogenide (As(2)S(3)) rib-waveguides
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