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Nonlinear optical response of low loss silicon germanium waveguides in the mid-infrared

Carletti, L.; Ma, Pan; Yu, Yi; Luther-Davies, Barry; Hudson, D.; Monat, C.; Orobtchouk, R.; Madden, Stephen; Moss, D. J.; Brun, M.; Ortiz, S.; Labeye, P.; Nicoletti, S.; Grillet, C.


We have investigated the nonlinear optical response of low loss Si(0.6)Ge(0.4) / Si waveguides in the mid-infrared wavelength range from 3.25- 4.75μm using picosecond optical pulses. We observed and measured the three and four-photon absorption coefficients as well as the Kerr nonlinear refractive index. The dynamics of the spectral broadening suggests that, in addition to multiphoton absorption, the corresponding higher order nonlinear refractive phenomena also needs to be included when high...[Show more]

CollectionsANU Research Publications
Date published: 2015-04-06
Type: Journal article
Source: Optics express
DOI: 10.1364/OE.23.008261


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