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Theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre
Orbital angular momentum (OAM) modes are another mode basis to represent spatial modes. There have been increasing interests in exploiting OAM modes in specialty fibres. In this paper, we present a comprehensive characterisation of OAM modes in conventional graded-index multimode fibre (MMF). 1) We...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5479839/ https://www.ncbi.nlm.nih.gov/pubmed/28638058 http://dx.doi.org/10.1038/s41598-017-04380-7 |
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author | Chen, Shi Wang, Jian |
author_facet | Chen, Shi Wang, Jian |
author_sort | Chen, Shi |
collection | PubMed |
description | Orbital angular momentum (OAM) modes are another mode basis to represent spatial modes. There have been increasing interests in exploiting OAM modes in specialty fibres. In this paper, we present a comprehensive characterisation of OAM modes in conventional graded-index multimode fibre (MMF). 1) We synthesise the circularly polarized OAM modes by properly combining two fold degenerate cylindrical vector modes (eigenmodes) and analyse the total angular momentum, i.e. spin angular momentum and orbital angular momentum. 2) We divide all the OAM modes of the conventional graded-index MMF into 10 OAM mode groups with effective refractive index differences between different mode groups above 10(−4) enabling low-level inter-group crosstalk. 3) We study the chromatic dispersion, differential group delay, effective mode area, and nonlinearity for each OAM mode group over a wide wavelength ranging from 1520 to 1630 nm covering the whole C band and L band. 4) We discuss the performance tolerance to fibre ellipticity and bending. 5) We further address the robustness of performance against fibre perturbations including the core size, index contrast and the imperfect index profile of the practically fabricated MMFs. The obtained results may provide theoretical basis for further space-division multiplexing applications employing OAM modes in conventional graded-index MMF. |
format | Online Article Text |
id | pubmed-5479839 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54798392017-06-23 Theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre Chen, Shi Wang, Jian Sci Rep Article Orbital angular momentum (OAM) modes are another mode basis to represent spatial modes. There have been increasing interests in exploiting OAM modes in specialty fibres. In this paper, we present a comprehensive characterisation of OAM modes in conventional graded-index multimode fibre (MMF). 1) We synthesise the circularly polarized OAM modes by properly combining two fold degenerate cylindrical vector modes (eigenmodes) and analyse the total angular momentum, i.e. spin angular momentum and orbital angular momentum. 2) We divide all the OAM modes of the conventional graded-index MMF into 10 OAM mode groups with effective refractive index differences between different mode groups above 10(−4) enabling low-level inter-group crosstalk. 3) We study the chromatic dispersion, differential group delay, effective mode area, and nonlinearity for each OAM mode group over a wide wavelength ranging from 1520 to 1630 nm covering the whole C band and L band. 4) We discuss the performance tolerance to fibre ellipticity and bending. 5) We further address the robustness of performance against fibre perturbations including the core size, index contrast and the imperfect index profile of the practically fabricated MMFs. The obtained results may provide theoretical basis for further space-division multiplexing applications employing OAM modes in conventional graded-index MMF. Nature Publishing Group UK 2017-06-21 /pmc/articles/PMC5479839/ /pubmed/28638058 http://dx.doi.org/10.1038/s41598-017-04380-7 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Chen, Shi Wang, Jian Theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre |
title | Theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre |
title_full | Theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre |
title_fullStr | Theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre |
title_full_unstemmed | Theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre |
title_short | Theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre |
title_sort | theoretical analyses on orbital angular momentum modes in conventional graded-index multimode fibre |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5479839/ https://www.ncbi.nlm.nih.gov/pubmed/28638058 http://dx.doi.org/10.1038/s41598-017-04380-7 |
work_keys_str_mv | AT chenshi theoreticalanalysesonorbitalangularmomentummodesinconventionalgradedindexmultimodefibre AT wangjian theoreticalanalysesonorbitalangularmomentummodesinconventionalgradedindexmultimodefibre |