Dispersion trimming for mid-infrared supercontinuum generation in a hybrid chalcogenide/silicon-germanium waveguide
Date
2019-01-08
Authors
Sinobad, M.
Della Torre, Alberto
Luther-Davies, Barry
Ma, Pan
Madden, Steve
Debbarma, Sukanta
Vu, Khu
Moss, David J.
Mitchell, Arnan
Hartmann, Jean-Michel
Journal Title
Journal ISSN
Volume Title
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.
Description
Keywords
Citation
Collections
Source
Journal of the Optical Society of America B
Type
Journal article
Book Title
Entity type
Access Statement
Open Access
License Rights
OSA Open Access Publishing Agreement
Restricted until
Downloads
File
Description