Phase shift induced degradation of polarization caused by bends in inhibited-coupling guiding hollow-core fibers

Christian Röhrer (1) , Jonas Osorio (2) , Frieder Beirow , Martin Maurel (2) , Benoît Debord (2) , Thomas Graf , Frédéric Gérôme (2) , Fetah Benabid (2) , Marwan Abdou Ahmed

1 Université de stuttgart
2 XLIM-PHOT - Photonique Fibre et Sources Cohérentes

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.

Mots clés: Fiber properties; hollow-core fibers; polarization-maintaining fibers; photonic crystal fibers

Domaines: Optique / photonique

Christian Röhrer, Jonas Osorio, Frieder Beirow, Martin Maurel, Benoît Debord, et al.. Phase shift induced degradation of polarization caused by bends in inhibited-coupling guiding hollow-core fibers. IEEE Photonics Technology Letters, 2019, 31 (16), pp.1362-1365. ⟨10.1109/LPT.2019.2927046⟩. ⟨hal-02327997⟩