Bernas M, Zolnacz K, Napiorkowski M, Statkiewicz-Barabach G, Urbanczyk W. Conversion of LP
11 modes to vortex modes in a gradually twisted highly birefringent optical fiber.
OPTICS LETTERS 2021;
46:4446-4449. [PMID:
34525018 DOI:
10.1364/ol.433952]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/08/2021] [Indexed: 06/13/2023]
Abstract
We experimentally demonstrate the possibility of quasi-adiabatic conversion of LP11 modes to vortex modes in a twisted highly birefringent fiber with a gradually increasing twist rate. Based on the value of the effective indices, the LP11 modes are selectively converted to right- and left-handed circularly polarized vortex modes HE21 with a total angular momentum of ±2 and to quasi-TE01/TM01 modes with a total angular momentum of 0. Since the proposed conversion method has a purely topological origin, it is broadband in nature, in contrast to the methods based on resonant effects.
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