Forward stimulated Brillouin scattering and opto-mechanical non-reciprocity in standard polarization maintaining fibres

Gil Bashan, Hilel Hagai Diamandi, Yosef London, Kavita Sharma, Keren Shemer, Elad Zehavi, Avi Zadok

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27 Scopus citations


Opto-mechanical interactions in guided wave media are drawing great interest in fundamental research and applications. Forward stimulated Brillouin scattering, in particular, is widely investigated in optical fibres and photonic integrated circuits. In this work, we report a comprehensive study of forward stimulated Brillouin scattering over standard, panda-type polarization maintaining fibres. We distinguish between intra-polarization scattering, in which two pump tones are co-polarized along one principal axis, and inter-polarization processes driven by orthogonally polarized pump waves. Both processes are quantified in analysis, calculations and experiment. Inter-modal scattering, in particular, introduces cross-polarization switching of probe waves that is non-reciprocal. Switching takes place in multiple wavelength windows. The results provide a first demonstration of opto-mechanical non-reciprocity of forward scatter in standard fibre. The inter-polarization process is applicable to distributed sensors of media outside the cladding and coating boundaries, where light cannot reach. The process may be scaled towards forward Brillouin lasers, optical isolators and circulators and narrowband microwave-photonic filters over longer sections of off-the-shelf polarization maintaining fibres.

Original languageEnglish
Article number119
JournalLight: Science and Applications
Issue number1
StatePublished - Dec 2021

Bibliographical note

Funding Information:
This research was supported in part by a Starter Grant from the European Research Council (ERC), Grant number 679228 L-SID, and by the Israel Ministry of Science and Technology, Grant number 61047. G.B. is supported by the Adams Fellowship Program of the Israel Academy of Sciences and Humanities. H.H.D. is grateful to the Azrieli Foundation for the award of an Azrieli Fellowship.

Publisher Copyright:
© 2021, The Author(s).


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