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

Sinobad, Milan; Torre, Alberto Della; Armand, Rémi; Luther‐Davies, Barry; Ma, Pan; Madden, Steve; Mitchell, Arnan; Moss, David J.; Hartmann, Jean‐Michel; Fédéli, Jean-Marc; Monat, Christelle; Grillet, Christian

doi:10.1364/ol.402159

Cited by 56 publications

(48 citation statements)

References 31 publications

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“…Our results verify PdSe 2 as a promising 2D material with prominent nonlinear optical properties similar to graphene oxide [46][47][48][49], and potentially even for mid IR applications on platforms such as Si-Ge [50][51][52][53][54][55][56][57].…”

Section: Z-scan Measurementssupporting

confidence: 67%

High Optical Kerr Nonlinearity of PdSe2 Di-chalcogenide 2D Films for Nonlinear Photonic Chips

Moss¹,

Wu²,

Jia³

2021

Preprint

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As a novel layered noble metal dichalcogenide material, palladium diselenide (PdSe2) has attracted wide interest due to its excellent optical and electronic properties. In this work, a strong third-order nonlinear optical response of 2D PdSe2 films is reported. We conduct both open-aperture (OA) and closed-aperture (CA) Z-scan measurements with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe2 film of β = 3.26 ×10− 8 m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of n2 = -1.33×10− 15 m2/W – two orders of magnitude larger than bulk silicon. In addition, the variation of n2 as a function of laser intensity is also characterized, with n2 decreasing in magnitude when increasing incident laser intensity, becoming saturated at n2 = -9.96×10− 16 m2/W at high intensities. Our results show that the extraordinary third-order nonlinear optical properties of PdSe2 have strong potential for high-performance nonlinear photonic devices.

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Section: Z-scan Measurementssupporting

confidence: 67%

High Optical Kerr Nonlinearity of PdSe2 Di-chalcogenide 2D Films for Nonlinear Photonic Chips

Moss¹,

Wu²,

Jia³

2021

Preprint

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“…Finally, soliton crystals have recently [202][203][204][205] been shown to be able to achieve a range of RF functions without the need for any spectral shapingonly by triggering the different soliton states through different pumping conditions which yields different spectra. This could potentially extend to the mid IR region as well [206][207][208][209][210] since these systems are not fundamentally restricted to operating in the telecom band. This adds an entirely new dimension to microcombs beyond what is possible with DKS states.…”

Section: Discussionmentioning

confidence: 99%

Photonic RF and microwave temporal signal processing based on optical Kerr micro-combs

Moss¹

2021

Preprint

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Integrated Kerr micro-combs are a powerful source of multiple wavelength channels for photonic radio frequency (RF) and microwave signal processing, particularly for transversal filter systems. They offer significant advantages featuring a compact device footprint, high versatility, large numbers of wavelengths, and wide Nyquist bands. We review progress photonic RF and microwave high bandwidth temporal signal processing based on Kerr micro-combs with comb spacings from 49GHz to 200GHz. We focus on integral and fractional Hilbert transforms, differentiators as well as integrators. The future potential of optical micro-combs for RF photonic applications in terms of functionality and ability to realize integrated solutions is also discussed.

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“…The maximum operation frequency of our channelizers was determined by the Nyquist frequency of our microcomb source, which was 48.9 GHz / 2 = 24.45 GHz for the soliton crystal devices and 100GHz for the 200GHz microcomb device. Hence, the 200 GHz system had a much higher potential maximum RF operation frequency of 100 GHz-although this comes with a tradeoff with the number of comb lines within the available wavelength range [188][189][190][191][192][193][194][195][196][197][198], although in principle micro-combs can extend potentially even into the mid-IR [199][200][201][202][203][204][205].…”

Section: Discussionmentioning

confidence: 99%

Passive ring resonators and Kerr micro-combs for microwave spectrum channel separation

Moss

2021

Preprint

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

Cited by 56 publications

References 31 publications

High Optical Kerr Nonlinearity of PdSe2 Di-chalcogenide 2D Films for Nonlinear Photonic Chips

High Optical Kerr Nonlinearity of PdSe2 Di-chalcogenide 2D Films for Nonlinear Photonic Chips

Photonic RF and microwave temporal signal processing based on optical Kerr micro-combs

Passive ring resonators and Kerr micro-combs for microwave spectrum channel separation

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