Phase Shift Induced Degradation of Polarization Caused by Bends in Inhibited-Coupling Guiding Hollow-Core Fibers

Authors :: Benoit Debord
Christian Rohrer
Marwan Abdou Ahmed
Thomas Graf
Jonas H. Osório
Frédéric Gérôme
Frieder Beirow
Fetah Benabid
Martin Maurel
Université de stuttgart
Université de Stuttgart
Photonique Fibre et Sources Cohérentes (XLIM-PHOT)
XLIM (XLIM)
Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)
Source :: IEEE Photonics Technology Letters, IEEE Photonics Technology Letters, Institute of Electrical and Electronics Engineers, 2019, 31 (16), pp.1362-1365. ⟨10.1109/LPT.2019.2927046⟩
Publication Year :: 2019
Publisher :: Institute of Electrical and Electronics Engineers (IEEE), 2019.
Abstract: International audience; We report on a comprehensive analysis of the polarization-maintaining behavior of two different kinds of inhibited-coupling guiding hollow-core fibers and the influence of fiber bends. A phase shift induced degradation of the incident linear polarization state was observed due to a mismatch of the propagation constants of the orthogonally polarized LP01-modes of the fiber. This effect was predicted theoretically and is corroborated with numerical simulations and experimental results. It is shown that the phase shift is enhanced by a reduction of the bending radius of the fiber, but can be circumvented by orienting the polarization of the injected beam either parallel or perpendicular to the plane of bending.

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