Coherent combining of self-cleaned multimode beams

Abstract A low intensity light beam emerges from a graded-index, highly multimode optical fibre with a speckled shape, while at higher intensity the Kerr nonlinearity may induce a spontaneous spatial self-cleaning of the beam. Here, we reveal that we can generate two self-cleaned beams with a mutual...

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Autores principales:	Marc Fabert, Maria Săpânțan, Katarzyna Krupa, Alessandro Tonello, Yann Leventoux, Sébastien Février, Tigran Mansuryan, Alioune Niang, Benjamin Wetzel, Guy Millot, Stefan Wabnitz, Vincent Couderc
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9e7dd25cc2fb44c08911323ae18d6f82
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spelling	oai:doaj.org-article:9e7dd25cc2fb44c08911323ae18d6f822021-12-02T15:10:06ZCoherent combining of self-cleaned multimode beams10.1038/s41598-020-77505-02045-2322https://doaj.org/article/9e7dd25cc2fb44c08911323ae18d6f822020-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77505-0https://doaj.org/toc/2045-2322Abstract A low intensity light beam emerges from a graded-index, highly multimode optical fibre with a speckled shape, while at higher intensity the Kerr nonlinearity may induce a spontaneous spatial self-cleaning of the beam. Here, we reveal that we can generate two self-cleaned beams with a mutual coherence large enough to produce a clear stable fringe pattern at the output of a nonlinear interferometer. The two beams are pumped by the same input laser, yet are self-cleaned into independent multimode fibres. We thus prove that the self-cleaning mechanism preserves the beams’ mutual coherence via a noise-free parametric process. While directly related to the initial pump coherence, the emergence of nonlinear spatial coherence is achieved without additional noise, even for self-cleaning obtained on different modes, and in spite of the fibre structural disorder originating from intrinsic imperfections or external perturbations. Our discovery may impact theoretical approaches on wave condensation, and open new opportunities for coherent beam combining.Marc FabertMaria SăpânțanKatarzyna KrupaAlessandro TonelloYann LeventouxSébastien FévrierTigran MansuryanAlioune NiangBenjamin WetzelGuy MillotStefan WabnitzVincent CoudercNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-6 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marc Fabert Maria Săpânțan Katarzyna Krupa Alessandro Tonello Yann Leventoux Sébastien Février Tigran Mansuryan Alioune Niang Benjamin Wetzel Guy Millot Stefan Wabnitz Vincent Couderc Coherent combining of self-cleaned multimode beams
description	Abstract A low intensity light beam emerges from a graded-index, highly multimode optical fibre with a speckled shape, while at higher intensity the Kerr nonlinearity may induce a spontaneous spatial self-cleaning of the beam. Here, we reveal that we can generate two self-cleaned beams with a mutual coherence large enough to produce a clear stable fringe pattern at the output of a nonlinear interferometer. The two beams are pumped by the same input laser, yet are self-cleaned into independent multimode fibres. We thus prove that the self-cleaning mechanism preserves the beams’ mutual coherence via a noise-free parametric process. While directly related to the initial pump coherence, the emergence of nonlinear spatial coherence is achieved without additional noise, even for self-cleaning obtained on different modes, and in spite of the fibre structural disorder originating from intrinsic imperfections or external perturbations. Our discovery may impact theoretical approaches on wave condensation, and open new opportunities for coherent beam combining.
format	article
author	Marc Fabert Maria Săpânțan Katarzyna Krupa Alessandro Tonello Yann Leventoux Sébastien Février Tigran Mansuryan Alioune Niang Benjamin Wetzel Guy Millot Stefan Wabnitz Vincent Couderc
author_facet	Marc Fabert Maria Săpânțan Katarzyna Krupa Alessandro Tonello Yann Leventoux Sébastien Février Tigran Mansuryan Alioune Niang Benjamin Wetzel Guy Millot Stefan Wabnitz Vincent Couderc
author_sort	Marc Fabert
title	Coherent combining of self-cleaned multimode beams
title_short	Coherent combining of self-cleaned multimode beams
title_full	Coherent combining of self-cleaned multimode beams
title_fullStr	Coherent combining of self-cleaned multimode beams
title_full_unstemmed	Coherent combining of self-cleaned multimode beams
title_sort	coherent combining of self-cleaned multimode beams
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/9e7dd25cc2fb44c08911323ae18d6f82
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Coherent combining of self-cleaned multimode beams

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