Mid-infrared supercontinuum generation in silicon-germanium all-normal dispersion waveguides

We demonstrate coherent supercontinuum generation spanning over an octave from a silicon germanium-on-silicon waveguide using ∼ 200 f s pulses at a wavelength of 4 µm. The waveguide is engineered to provide low all-normal dispersion in the TM polarization. We validate the coherence of the generated...

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Bibliographic Details
Published in:Optics letters 2020-09, Vol.45 (18), p.5008-5011
Main Authors: Sinobad, Milan, DellaTorre, Alberto, Armand, Remi, Luther-Davies, Barry, Ma, Pan, Madden, Stephen, Mitchell, Arnan, Moss, David J., Hartmann, Jean-Michel, Fedeli, Jean-Marc, Monat, Christelle, Grillet, Christian
Format: Article
Language:English
Subjects:
Coherence
Electromagnetism
Engineering Sciences
Germanium
Optics
Photonic
Pulse compression
Silicon
Waveguides
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Summary:We demonstrate coherent supercontinuum generation spanning over an octave from a silicon germanium-on-silicon waveguide using ∼ 200 f s pulses at a wavelength of 4 µm. The waveguide is engineered to provide low all-normal dispersion in the TM polarization. We validate the coherence of the generated supercontinuum via simulations, with a high degree of coherence across the entire spectrum. Such a generated supercontinuum could lend itself to pulse compression down to 22 fs.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.402159