Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes

In this paper, we experimentally demonstrate that a nonlinear Kerr effect in suitable coupling conditions can introduce a spatially self-cleaned output beam for a few-mode step-index fiber. The impact of the distribution of the initial excited modes on spatial beam self-cleaning has been demonstrate...

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Autores principales: Mohammadzahery, Zahra, Jandaghi, Maryam, Aghayari, Ebrahim, Nabavi, Hasan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8692529/
https://www.ncbi.nlm.nih.gov/pubmed/34934169
http://dx.doi.org/10.1038/s41598-021-03856-x
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author Mohammadzahery, Zahra
Jandaghi, Maryam
Aghayari, Ebrahim
Nabavi, Hasan
author_facet Mohammadzahery, Zahra
Jandaghi, Maryam
Aghayari, Ebrahim
Nabavi, Hasan
author_sort Mohammadzahery, Zahra
collection PubMed
description In this paper, we experimentally demonstrate that a nonlinear Kerr effect in suitable coupling conditions can introduce a spatially self-cleaned output beam for a few-mode step-index fiber. The impact of the distribution of the initial excited modes on spatial beam self-cleaning has been demonstrated. It is also shown experimentally that for specific initial conditions, the output spatial pattern of the pulsed laser can be reshaped into the LP(11) mode due to nonlinear coupling among the propagating modes. Self-cleaning into LP(11) mode required higher input powers with respect to the power threshold for LP(01) mode self-cleaning. Our experimental results are in agreement with the results of numerical calculations.
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spelling pubmed-86925292021-12-28 Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes Mohammadzahery, Zahra Jandaghi, Maryam Aghayari, Ebrahim Nabavi, Hasan Sci Rep Article In this paper, we experimentally demonstrate that a nonlinear Kerr effect in suitable coupling conditions can introduce a spatially self-cleaned output beam for a few-mode step-index fiber. The impact of the distribution of the initial excited modes on spatial beam self-cleaning has been demonstrated. It is also shown experimentally that for specific initial conditions, the output spatial pattern of the pulsed laser can be reshaped into the LP(11) mode due to nonlinear coupling among the propagating modes. Self-cleaning into LP(11) mode required higher input powers with respect to the power threshold for LP(01) mode self-cleaning. Our experimental results are in agreement with the results of numerical calculations. Nature Publishing Group UK 2021-12-21 /pmc/articles/PMC8692529/ /pubmed/34934169 http://dx.doi.org/10.1038/s41598-021-03856-x Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Mohammadzahery, Zahra
Jandaghi, Maryam
Aghayari, Ebrahim
Nabavi, Hasan
Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes
title Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes
title_full Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes
title_fullStr Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes
title_full_unstemmed Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes
title_short Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes
title_sort observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8692529/
https://www.ncbi.nlm.nih.gov/pubmed/34934169
http://dx.doi.org/10.1038/s41598-021-03856-x
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