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Modulation-free laser stabilization technique using integrated cavity-coupled Mach-Zehnder interferometer

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Listed:
  • Mohamad Hossein Idjadi

    (Nokia Bell Labs)

  • Kwangwoong Kim

    (Nokia Bell Labs)

  • Nicolas K. Fontaine

    (Nokia Bell Labs)

Abstract

Stable lasers play a significant role in precision optical systems where an electro-optic laser frequency stabilization system, such as the Pound-Drever-Hall technique, measures laser frequency and actively stabilizes it by comparing it to a frequency reference. Despite their excellent performance, there has been a trade-off between complexity, scalability, and noise measurement sensitivity. Here, we propose and experimentally demonstrate a modulation-free laser stabilization method using an integrated cavity-coupled Mach-Zehnder interferometer as a frequency noise discriminator. The proposed architecture maintains the sensitivity of the Pound-Drever-Hall architecture without the need for any modulation. This significantly simplifies the architecture and makes miniaturization into an integrated photonic platform easier. The implemented chip suppresses the frequency noise of a semiconductor laser by 4 orders-of-magnitude using an on-chip silicon microresonator with a quality factor of 2.5 × 106. The implemented passive photonic chip occupies an area of 0.456 mm2 and is integrated on AIM Photonics 100 nm silicon-on-insulator process.

Suggested Citation

  • Mohamad Hossein Idjadi & Kwangwoong Kim & Nicolas K. Fontaine, 2024. "Modulation-free laser stabilization technique using integrated cavity-coupled Mach-Zehnder interferometer," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46319-3
    DOI: 10.1038/s41467-024-46319-3
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    References listed on IDEAS

    as
    1. W. Liang & V. S. Ilchenko & D. Eliyahu & A. A. Savchenkov & A. B. Matsko & D. Seidel & L. Maleki, 2015. "Ultralow noise miniature external cavity semiconductor laser," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
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