Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients

The improvement of techniques for the generation of near-infrared (NIR) few-cycle pulses is paving the way for new scenarios in time-resolved spectroscopy and the generation of ultrashort extreme-ultraviolet pulses through high-harmonic generation. In this work, we numerically study how to optimize...

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Autores: Fernández Galán, Marina, Conejero Jarque, Enrique, San Román Álvarez de Lara, Julio
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Recursos:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/148576
Acesso em linha:http://hdl.handle.net/10366/148576
Access Level:acceso abierto
Palavra-chave:High harmonic generation
Hollow core fibers
Phase compensation
Self phase modulation
Time resolved spectroscopy
Ultrashort pulses
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spelling Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradientsFernández Galán, MarinaConejero Jarque, EnriqueSan Román Álvarez de Lara, JulioHigh harmonic generationHollow core fibersPhase compensationSelf phase modulationTime resolved spectroscopyUltrashort pulsesThe improvement of techniques for the generation of near-infrared (NIR) few-cycle pulses is paving the way for new scenarios in time-resolved spectroscopy and the generation of ultrashort extreme-ultraviolet pulses through high-harmonic generation. In this work, we numerically study how to optimize the self-compression of NIR pulses using decreasing pressure gradients in hollow capillary fibers (HCFs). We identify a moderate nonlinear regime in which sub-cycle pulses are obtained with very good temporal quality from an input 30 fs pulse centered at a 800 nm wavelength and coupled as the fundamental mode of an argon-filled HCF fully evacuated at the output end. Surprisingly, we observe that there is a relatively broad region of parameters for which the optimum self-compression takes place, defined by a simple relation between the input pulse energy and the initial gas pressure.This work was supported by grant PID2019-106910GB-I00, funded by the Spanish Ministry of Science and Innovation, MCIN/AEI/ 10.13039/501100011033.202220222022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10366/148576reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésPID2019-106910GB-I00info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1485762026-06-07T06:28:51Z
dc.title.none.fl_str_mv Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients
title Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients
spellingShingle Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients
Fernández Galán, Marina
High harmonic generation
Hollow core fibers
Phase compensation
Self phase modulation
Time resolved spectroscopy
Ultrashort pulses
title_short Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients
title_full Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients
title_fullStr Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients
title_full_unstemmed Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients
title_sort Optimization of pulse self-compression in hollow capillary fibers using decreasing pressure gradients
dc.creator.none.fl_str_mv Fernández Galán, Marina
Conejero Jarque, Enrique
San Román Álvarez de Lara, Julio
author Fernández Galán, Marina
author_facet Fernández Galán, Marina
Conejero Jarque, Enrique
San Román Álvarez de Lara, Julio
author_role author
author2 Conejero Jarque, Enrique
San Román Álvarez de Lara, Julio
author2_role author
author
dc.subject.none.fl_str_mv High harmonic generation
Hollow core fibers
Phase compensation
Self phase modulation
Time resolved spectroscopy
Ultrashort pulses
topic High harmonic generation
Hollow core fibers
Phase compensation
Self phase modulation
Time resolved spectroscopy
Ultrashort pulses
description The improvement of techniques for the generation of near-infrared (NIR) few-cycle pulses is paving the way for new scenarios in time-resolved spectroscopy and the generation of ultrashort extreme-ultraviolet pulses through high-harmonic generation. In this work, we numerically study how to optimize the self-compression of NIR pulses using decreasing pressure gradients in hollow capillary fibers (HCFs). We identify a moderate nonlinear regime in which sub-cycle pulses are obtained with very good temporal quality from an input 30 fs pulse centered at a 800 nm wavelength and coupled as the fundamental mode of an argon-filled HCF fully evacuated at the output end. Surprisingly, we observe that there is a relatively broad region of parameters for which the optimum self-compression takes place, defined by a simple relation between the input pulse energy and the initial gas pressure.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10366/148576
url http://hdl.handle.net/10366/148576
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv PID2019-106910GB-I00
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname:Universidad de Salamanca (USAL)
instname_str Universidad de Salamanca (USAL)
reponame_str GREDOS. Repositorio Institucional de la Universidad de Salamanca
collection GREDOS. Repositorio Institucional de la Universidad de Salamanca
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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