TY - JOUR
T1 - Dispersion trimming for mid-infrared supercontinuum generation in a hybrid chalcogenide/silicon-germanium waveguide
AU - Sinobad, Milan
AU - Torre, Alberto Della
AU - Luther-Davis, Barry
AU - Ma, Pan
AU - Madden, Stephen
AU - Debbarma, Sukanta
AU - Vu, Khu
AU - Moss, David J.
AU - Mitchell, Arnan
AU - Hartmann, Jean Michel
AU - Fedeli, Jean Marc
AU - Monat, Christelle
AU - Grillet, Christian
N1 - Publisher Copyright:
© 2019 Optical Society of America.
PY - 2019/2
Y1 - 2019/2
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85060886832&partnerID=8YFLogxK
U2 - 10.1364/JOSAB.36.000A98
DO - 10.1364/JOSAB.36.000A98
M3 - Article
SN - 0740-3224
VL - 36
SP - A98-A104
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
IS - 2
ER -