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Optical power limiter in the femtosecond filamentation regime

We present the use of a power limiting apparatus to evaluate ultrafast optical nonlinearities of transparent liquids (water and ethanol) in the femtosecond filamentation regime. The setup has been previously employed for the same purpose, however, in a longer pulsewidth (> 20 ps) regime, which le...

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Autores principales: Agiotis, Leonidas, Meunier, Michel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8275795/
https://www.ncbi.nlm.nih.gov/pubmed/34253771
http://dx.doi.org/10.1038/s41598-021-93683-x
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author Agiotis, Leonidas
Meunier, Michel
author_facet Agiotis, Leonidas
Meunier, Michel
author_sort Agiotis, Leonidas
collection PubMed
description We present the use of a power limiting apparatus to evaluate ultrafast optical nonlinearities of transparent liquids (water and ethanol) in the femtosecond filamentation regime. The setup has been previously employed for the same purpose, however, in a longer pulsewidth (> 20 ps) regime, which leads to an ambiguous evaluation of the critical power for self-focusing. The uncertainty originates from the existence of a threshold power for optical breakdown well below the critical power for self-focusing within this timeframe. Contrarily, using the proposed apparatus in the femtosecond regime, we observe for the first time a unique optical response, which features the underlying physics of laser filamentation. Importantly, we demonstrate a dependence of the optical transmission of the power limiter on its geometrical, imaging characteristics and the conditions under which a distinct demarcation for the critical power for self-focusing can be determined. The result is supported by numerical simulations, which indicate that the features of the observed power-dependent optical response of the power limiting setup are physically related to the spontaneous transformation of the laser pulses into nonlinear conical waves.
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spelling pubmed-82757952021-07-13 Optical power limiter in the femtosecond filamentation regime Agiotis, Leonidas Meunier, Michel Sci Rep Article We present the use of a power limiting apparatus to evaluate ultrafast optical nonlinearities of transparent liquids (water and ethanol) in the femtosecond filamentation regime. The setup has been previously employed for the same purpose, however, in a longer pulsewidth (> 20 ps) regime, which leads to an ambiguous evaluation of the critical power for self-focusing. The uncertainty originates from the existence of a threshold power for optical breakdown well below the critical power for self-focusing within this timeframe. Contrarily, using the proposed apparatus in the femtosecond regime, we observe for the first time a unique optical response, which features the underlying physics of laser filamentation. Importantly, we demonstrate a dependence of the optical transmission of the power limiter on its geometrical, imaging characteristics and the conditions under which a distinct demarcation for the critical power for self-focusing can be determined. The result is supported by numerical simulations, which indicate that the features of the observed power-dependent optical response of the power limiting setup are physically related to the spontaneous transformation of the laser pulses into nonlinear conical waves. Nature Publishing Group UK 2021-07-12 /pmc/articles/PMC8275795/ /pubmed/34253771 http://dx.doi.org/10.1038/s41598-021-93683-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
Agiotis, Leonidas
Meunier, Michel
Optical power limiter in the femtosecond filamentation regime
title Optical power limiter in the femtosecond filamentation regime
title_full Optical power limiter in the femtosecond filamentation regime
title_fullStr Optical power limiter in the femtosecond filamentation regime
title_full_unstemmed Optical power limiter in the femtosecond filamentation regime
title_short Optical power limiter in the femtosecond filamentation regime
title_sort optical power limiter in the femtosecond filamentation regime
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8275795/
https://www.ncbi.nlm.nih.gov/pubmed/34253771
http://dx.doi.org/10.1038/s41598-021-93683-x
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