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A forward Brillouin fibre laser

Author

Listed:
  • Gil Bashan

    (Bar-Ilan University)

  • H. Hagai Diamandi

    (Bar-Ilan University
    Weizmann Institute of Science)

  • Elad Zehavi

    (Bar-Ilan University)

  • Kavita Sharma

    (Bar-Ilan University)

  • Yosef London

    (Bar-Ilan University
    Currently with the Applied Physics Division, Soreq NRC)

  • Avi Zadok

    (Bar-Ilan University)

Abstract

Fibre lasers based on backward stimulated Brillouin scattering provide narrow linewidths and serve in signal processing and sensing applications. Stimulated Brillouin scattering in fibres takes place in the forward direction as well, with amplification bandwidths that are narrower by two orders of magnitude. However, forward Brillouin lasers have yet to be realized in any fibre platform. In this work, we report a first forward Brillouin fibre laser, using a bare off-the-shelf, panda-type polarisation maintaining fibre. Pump light in one principal axis provides Brillouin amplification for a co-propagating lasing signal of the orthogonal polarisation. Feedback is provided by Bragg gratings at both ends of the fibre cavity. Single-mode, few-modes and multi-mode regimes of operation are observed. The lasing threshold exhibits a unique environmental sensitivity: it is elevated when the fibre is partially immersed in water due to the broadening of forward Brillouin scattering spectra. The results establish a new type of fibre laser, with potential for ultra-high coherence and precision sensing of media outside the cladding.

Suggested Citation

  • Gil Bashan & H. Hagai Diamandi & Elad Zehavi & Kavita Sharma & Yosef London & Avi Zadok, 2022. "A forward Brillouin fibre laser," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31246-y
    DOI: 10.1038/s41467-022-31246-y
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    References listed on IDEAS

    as
    1. Gaurav Bahl & John Zehnpfennig & Matthew Tomes & Tal Carmon, 2011. "Stimulated optomechanical excitation of surface acoustic waves in a microdevice," Nature Communications, Nature, vol. 2(1), pages 1-6, September.
    2. Desmond M. Chow & Zhisheng Yang & Marcelo A. Soto & Luc Thévenaz, 2018. "Distributed forward Brillouin sensor based on local light phase recovery," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
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