Personne :
Genest, Jérôme

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Genest
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Jérôme
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Université Laval. Département de génie électrique et de génie informatique
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Identifiant Canadiana
ncf11850392
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2016 - 20202
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  • Publication
    Accès libre
    Dual-comb spectroscopy with a phase-modulated probe comb for sub-MHz spectral sampling
    (Optical Society, 2016-05-15) Deschênes, Jean-Daniel; Genest, Jérôme; Magnan-Saucier, Sébastien; Michaud-Belleau, Vincent; Bourbeau Hébert, Nicolas
    We present a straightforward and efficient method to reduce the mode spacing of a frequency comb based on binary pseudo-random phase modulation of its pulse train. As a proof of concept, we use such a densified comb to perform dual-comb spectroscopy of a long-delay Mach–Zehnder interferometer and a high-quality-factor microresonator with sub-MHz spectral sampling. Since this approach is based on binary phase modulation, it combines all the advantages of other densification techniques: simplicity, single-step implementation, and conservation of the initial comb’s power.
  • Publication
    Accès libre
    Etchless chalcogenide microresonators monolithically coupled to silicon photonic waveguides
    (Optical Society of America, 2020-05-13) Messaddeq, Sandra Helena; Genest, Jérôme; Jean, Philippe; LaRochelle, Sophie; Shi, Wei; Messaddeq, Younès; Douaud, Alexandre; Michaud-Belleau, Vincent
    Integration of chalcogenide waveguides in silicon photonics can mitigate the prohibitive nonlinear losses ofsilicon while leveraging the mature CMOS-compatiblenanophotonic fabrication process. In this work, wedemonstrate, for the first time, a method of integratinghigh-Q chalcogenides microring resonators onto the sil-icon photonics platform without post-process etching.The method uses micro-trench filling and a novel ther-mal dewetting technique to form low-loss chalcogenidestrip waveguides. The microrings are integrated di-rectly inside silicon photonic circuits through evanes-cent coupling, providing an uncomplicated hybrid in-tegration scheme without the need to modify the exist-ing photonics foundry process. The microrings showa high quality factor exceeding 6⇥105near 1550 nmand propagation losses below 0.7 dB/cm, indicatinga promising solution for low-cost, compact nonlinearphotonic devices with applications in various fieldssuch as telecommunications and spectroscopy.