Optical power limiter in the femtosecond filamentation regime

Abstract 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,...

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Autores principales:	Leonidas Agiotis, Michel Meunier
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/69593501f9354a7c90e16bfddd526a95
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spelling	oai:doaj.org-article:69593501f9354a7c90e16bfddd526a952021-12-02T16:08:07ZOptical power limiter in the femtosecond filamentation regime10.1038/s41598-021-93683-x2045-2322https://doaj.org/article/69593501f9354a7c90e16bfddd526a952021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93683-xhttps://doaj.org/toc/2045-2322Abstract 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.Leonidas AgiotisMichel MeunierNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Leonidas Agiotis Michel Meunier Optical power limiter in the femtosecond filamentation regime
description	Abstract 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.
format	article
author	Leonidas Agiotis Michel Meunier
author_facet	Leonidas Agiotis Michel Meunier
author_sort	Leonidas Agiotis
title	Optical power limiter in the femtosecond filamentation regime
title_short	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_sort	optical power limiter in the femtosecond filamentation regime
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/69593501f9354a7c90e16bfddd526a95
work_keys_str_mv	AT leonidasagiotis opticalpowerlimiterinthefemtosecondfilamentationregime AT michelmeunier opticalpowerlimiterinthefemtosecondfilamentationregime
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Optical power limiter in the femtosecond filamentation regime

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