Mid-infrared supercontinuum generation in hybrid chalcogenide/silicon-germanium waveguides
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Authors
Torre, Alberto Della
Sinobad, Milan
Armand, Rémi
Luther-Davies, Barry
Ma, Pan
Madden, Stephen
Debbarma, Sukanta
Vu, Khu
Moss, David J.
Mitchell, Arnan
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SPIE
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Abstract
We report mid-infrared supercontinuum generation in a silicon germanium-on-silicon waveguide. We show that, by adding a chalcogenide cladding, it is possible to trim a posteriori the waveguide's dispersion profile which, in turn, governs the properties of the generated supercontinuum. In particular, we experimentally show that a shift from anomalous to normal dispersion takes place when a 1.26 μm thick cladding layer of Ge11.5As24Se64.5 is added. Finally, we show that the group velocity dispersion of the waveguide can be precisely controlled by changing the thickness of the cladding layer.
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Book Title
AOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
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