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Optical linewidth of soliton microcombs

Author

Listed:
  • Fuchuan Lei

    (Chalmers University of Technology)

  • Zhichao Ye

    (Chalmers University of Technology)

  • Óskar B. Helgason

    (Chalmers University of Technology)

  • Attila Fülöp

    (Chalmers University of Technology)

  • Marcello Girardi

    (Chalmers University of Technology)

  • Victor Torres-Company

    (Chalmers University of Technology)

Abstract

Soliton microcombs provide a versatile platform for realizing fundamental studies and technological applications. To be utilized as frequency rulers for precision metrology, soliton microcombs must display broadband phase coherence, a parameter characterized by the optical phase or frequency noise of the comb lines and their corresponding optical linewidths. Here, we analyse the optical phase-noise dynamics in soliton microcombs generated in silicon nitride high-Q microresonators and show that, because of the Raman self-frequency shift or dispersive-wave recoil, the Lorentzian linewidth of some of the comb lines can, surprisingly, be narrower than that of the pump laser. This work elucidates information about the physical limits in phase coherence of soliton microcombs and illustrates a new strategy for the generation of spectrally coherent light on chip.

Suggested Citation

  • Fuchuan Lei & Zhichao Ye & Óskar B. Helgason & Attila Fülöp & Marcello Girardi & Victor Torres-Company, 2022. "Optical linewidth of soliton microcombs," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30726-5
    DOI: 10.1038/s41467-022-30726-5
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    References listed on IDEAS

    as
    1. Lars Lundberg & Mikael Mazur & Ali Mirani & Benjamin Foo & Jochen Schröder & Victor Torres-Company & Magnus Karlsson & Peter A. Andrekson, 2020. "Phase-coherent lightwave communications with frequency combs," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    2. Xu Yi & Qi-Fan Yang & Xueyue Zhang & Ki Youl Yang & Xinbai Li & Kerry Vahala, 2017. "Single-mode dispersive waves and soliton microcomb dynamics," Nature Communications, Nature, vol. 8(1), pages 1-9, April.
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    Cited by:

    1. Mingming Nie & Kunpeng Jia & Yijun Xie & Shining Zhu & Zhenda Xie & Shu-Wei Huang, 2022. "Synthesized spatiotemporal mode-locking and photonic flywheel in multimode mesoresonators," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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