Photonic quasicrystal fiber supporting orbital angular momentum modes

Myunghwan Kim; Chung Ghiu Lee; Soeun Kim

doi:10.1117/12.2509699

1 February 2019 Photonic quasicrystal fiber supporting orbital angular momentum modes

Myunghwan Kim, Chung Ghiu Lee, Soeun Kim

Proceedings Volume 10947, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VIII; 1094704 (2019) https://doi.org/10.1117/12.2509699
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

The orbital angular momentum (OAM) mode is considered as a new degree of freedom for mode division multiplexing (MDM) to overcome the increasing data capacity because of its orthogonality and theoretically unlimited number of OAM mode. Although OAM modes have been successfully demonstrated in free-space-based and conventional fibers, these have limited applications because of the gradual enlargement of these modes with propagation and small number of modes. In this paper, we propose a photonic quasi-crystal fiber (PQF) for supporting up to 38 orbital OAM mode with a flat dispersion characteristic over the C+L bands. We numerically investigated the eigenmodes in the proposed PQF and these effective indices, electric field intensity distributions, dispersion, and confinement loss. The designed PQF which consists of a large hollow center and quasi structural small air holes in the clad region exhibits low confinement losses and many number of OAM modes, and satisfies a radially single mode condition and a large effective index separation (>10^-4) between the same order of the OAM modes. This proposed fiber could potentially be exploited for mode division multiplexing and other OAM mode applications in fibers.

Citation Download Citation

Myunghwan Kim, Chung Ghiu Lee, and Soeun Kim "Photonic quasicrystal fiber supporting orbital angular momentum modes", Proc. SPIE 10947, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VIII, 1094704 (1 February 2019); https://doi.org/10.1117/12.2509699

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