Mid-infrared supercontinuum generation in a low-loss germanium-on-silicon waveguide

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

doi:10.1063/5.0033070

Mid-infrared supercontinuum generation in a low-loss germanium-on-silicon waveguide

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

We experimentally demonstrate supercontinuum (SC) generation in a germanium-on-silicon waveguide. This waveguide exhibits propagation loss between 1.2 dB/cm and 1.35 dB/cm in the 3.6 μm-4.5 μm spectral region for both transverse electric (TE) and transverse magnetic (TM) polarizations. By pumping the waveguide with ∼200 fs pulses at 4.6 μm wavelength, we generate a mid-infrared (IR) SC spanning nearly an octave from 3.39 μm to 6.02 μm at the -40 dB level. Through numerical analysis of the evolution of the SC, we attribute the current limit to further extension into the mid-IR mainly to free-carrier absorption.

Original language	English
Article number	016102
Journal	APL Photonics
Volume	6
Issue number	1
DOIs	https://doi.org/10.1063/5.0033070
Publication status	Published - 1 Jan 2021

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title = "Mid-infrared supercontinuum generation in a low-loss germanium-on-silicon waveguide",

abstract = "We experimentally demonstrate supercontinuum (SC) generation in a germanium-on-silicon waveguide. This waveguide exhibits propagation loss between 1.2 dB/cm and 1.35 dB/cm in the 3.6 μm-4.5 μm spectral region for both transverse electric (TE) and transverse magnetic (TM) polarizations. By pumping the waveguide with ∼200 fs pulses at 4.6 μm wavelength, we generate a mid-infrared (IR) SC spanning nearly an octave from 3.39 μm to 6.02 μm at the -40 dB level. Through numerical analysis of the evolution of the SC, we attribute the current limit to further extension into the mid-IR mainly to free-carrier absorption.",

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T1 - Mid-infrared supercontinuum generation in a low-loss germanium-on-silicon waveguide

AU - Della Torre, Alberto

AU - Sinobad, Milan

AU - Armand, Remi

AU - Luther-Davies, Barry

AU - Ma, Pan

AU - Madden, Stephen

AU - Mitchell, Arnan

AU - Moss, David J.

AU - Hartmann, Jean Michel

AU - Reboud, Vincent

AU - Fedeli, Jean Marc

AU - Monat, Christelle

AU - Grillet, Christian

PY - 2021/1/1

Y1 - 2021/1/1

N2 - We experimentally demonstrate supercontinuum (SC) generation in a germanium-on-silicon waveguide. This waveguide exhibits propagation loss between 1.2 dB/cm and 1.35 dB/cm in the 3.6 μm-4.5 μm spectral region for both transverse electric (TE) and transverse magnetic (TM) polarizations. By pumping the waveguide with ∼200 fs pulses at 4.6 μm wavelength, we generate a mid-infrared (IR) SC spanning nearly an octave from 3.39 μm to 6.02 μm at the -40 dB level. Through numerical analysis of the evolution of the SC, we attribute the current limit to further extension into the mid-IR mainly to free-carrier absorption.

AB - We experimentally demonstrate supercontinuum (SC) generation in a germanium-on-silicon waveguide. This waveguide exhibits propagation loss between 1.2 dB/cm and 1.35 dB/cm in the 3.6 μm-4.5 μm spectral region for both transverse electric (TE) and transverse magnetic (TM) polarizations. By pumping the waveguide with ∼200 fs pulses at 4.6 μm wavelength, we generate a mid-infrared (IR) SC spanning nearly an octave from 3.39 μm to 6.02 μm at the -40 dB level. Through numerical analysis of the evolution of the SC, we attribute the current limit to further extension into the mid-IR mainly to free-carrier absorption.

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U2 - 10.1063/5.0033070

DO - 10.1063/5.0033070

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M1 - 016102

ER -

Mid-infrared supercontinuum generation in a low-loss germanium-on-silicon waveguide

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