Octave-spanning mid-infrared supercontinuum generation in all-normal dispersion silicon germanium waveguide

Milan Sinobad; Alberto Della Torre; Remi Armand; Barry Luther-Davies; Pan Ma; Stephen Madden; Arnan Mitchell; David J. Moss; Jean-Michel Hartmann; Jean-Marc Fedeli; Christelle Monat; Christian Grillet

doi:10.1117/12.2576980

5 March 2021 Octave-spanning mid-infrared supercontinuum generation in all-normal dispersion silicon germanium waveguide

Milan Sinobad, Alberto Della Torre, Remi Armand, Barry Luther-Davies, Pan Ma, Stephen Madden, Arnan Mitchell, David J. Moss, Jean-Michel Hartmann, Jean-Marc Fedeli, Christelle Monat, Christian Grillet

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Proceedings Volume 11670, Nonlinear Frequency Generation and Conversion: Materials and Devices XX; 116700T (2021) https://doi.org/10.1117/12.2576980
Event: SPIE LASE, 2021, Online Only

Abstract

We report what we believe to be the first octave-spanning supercontinuum generation from all-normal dispersion waveguide on a silicon-based chip in the mid-infrared. Here we use 205 fs pulses at 4 μm coupled to low loss, 5.0 μm x 2.7 μm cross-section, silicon germanium-on-silicon waveguide operating in tha all-normal dispersion regime. Generated supercontinuum spans more than an octave between 2.8 and 5.7 μm. Besides, simulations show a high degree of coherence across the entire -30 dB spectrum. Such supercontinuum provides an ideal light probe for broadband mid-infrared molecular absorption spectroscopy.

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Milan Sinobad, Alberto Della Torre, Remi Armand, Barry Luther-Davies, Pan Ma, Stephen Madden, Arnan Mitchell, David J. Moss, Jean-Michel Hartmann, Jean-Marc Fedeli, Christelle Monat, and Christian Grillet "Octave-spanning mid-infrared supercontinuum generation in all-normal dispersion silicon germanium waveguide", Proc. SPIE 11670, Nonlinear Frequency Generation and Conversion: Materials and Devices XX, 116700T (5 March 2021); https://doi.org/10.1117/12.2576980

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