Cross-phase modulational instability of circularly polarized helical Bloch modes carrying optical vortices in a chiral three-core photonic crystal fiber

Roth P, Frosz MH, Weise L, Russell PSJ, Wong GKL (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Optics Letters Optical Society of America

Book Volume: 46

Pages Range: 174-177

Journal Issue: 2

DOI: 10.1364/OL.413557

Abstract

We report the first, to the best of our knowledge, observation of cross-phase modulational instability (XPMI) of circularly polarized helical Bloch modes carrying optical vortices in a twisted photonic crystal fiber with a three-fold symmetric core, formed by spinning the fiber preform during the draw. When the fiber is pumped by a superposition of left-circular polarization (LCP) and right-circular polarization (RCP) modes, a pair of orthogonal circularly polarized sidebands of opposite topological charge is generated. When, on the other hand, a pure LCP (or RCP) mode is launched, the XPMI gain is zero, and no sidebands are seen. This observation has not been seen before in any system and is unique to chiral structures with N-fold rotational symmetry. The polarization state and topological charge of the generated sidebands are measured. By decomposing the helical Bloch modes into their azimuthal harmonics, we are able to deduce the selection rules for the appearance of modulational instability sidebands. We showed that the four waves in the nonlinear mixing process must exhibit the same set of azimuthal harmonic orders. (C) 2021 Optical Society of America

Authors with CRIS profile

Paul Roth Lehrstuhl für Experimentalphysik (Alfried Krupp von Bohlen und Halbach-Professur) Philip St. John Russell Lehrstuhl für Experimentalphysik (Alfried Krupp von Bohlen und Halbach-Professur)

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Roth, P., Frosz, M.H., Weise, L., Russell, P.S.J., & Wong, G.K.L. (2021). Cross-phase modulational instability of circularly polarized helical Bloch modes carrying optical vortices in a chiral three-core photonic crystal fiber. Optics Letters, 46(2), 174-177. https://doi.org/10.1364/OL.413557

MLA:

Roth, Paul, et al. "Cross-phase modulational instability of circularly polarized helical Bloch modes carrying optical vortices in a chiral three-core photonic crystal fiber." Optics Letters 46.2 (2021): 174-177.

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