Dispersion trimming for mid-infrared supercontinuum generation in a hybrid chalcogenide/silicon-germanium waveguide

Sinobad, M, Torre, A, Luther-Davies, B and Mitchell, A., et al, 2019, 'Dispersion trimming for mid-infrared supercontinuum generation in a hybrid chalcogenide/silicon-germanium waveguide', Journal of the Optical Society of America B: Optical Physics, vol. 36, no. 2, pp. 1-7.


Document type: Journal Article
Collection: Journal Articles

Title Dispersion trimming for mid-infrared supercontinuum generation in a hybrid chalcogenide/silicon-germanium waveguide
Author(s) Sinobad, M
Torre, A
Luther-Davies, B
Mitchell, A., et al,
Year 2019
Journal name Journal of the Optical Society of America B: Optical Physics
Volume number 36
Issue number 2
Start page 1
End page 7
Total pages 7
Publisher Optical Society of America
Abstract We report a simple post-process technique that harnesses a hybrid chalcogenide/silicon-germanium system for the control of waveguide dispersion. By adding a chalcogenide top cladding to a SiGe/Si waveguide, we can substantially change the dispersive properties, which underpin the generation of a supercontinuum. In our particular example, we experimentally show that a shift from anomalous to normal dispersion takes place. We numerically study the dispersion dependence on the chalcogenide thickness and show how to use this additional degree of freedom to control the position of the zero dispersion wavelengths and hence the spectral span of the supercontinuum. Finally, we compare our approach with more traditional techniques that use geometry for dispersion tailoring.
Subject Photonics and Electro-Optical Engineering (excl. Communications)
DOI - identifier 10.1364/JOSAB.36.000A98
Copyright notice © 2019 Optical Society of America
ISSN 0740-3224
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