Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses

We present a technique for efficient generation of the second-harmonic signal at several points of a nonlinear crystal simultaneously. Multispot operation is performed by using a diffractive optical element that splits the near-infrared light of a mode-locked Ti:sapphire laser into an arbitrary arra...

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Authors: Martínez-Cuenca, Raúl, Mendoza Yero, Omel, Alonso Fernández, Benjamín, Sola Larrañaga, Iñigo Juan, Mínguez Vega, Gladys, Láncis, Jesús
Format: article
Status:Published version
Publication Date:2012
Country:España
Institution:Universidad de Salamanca (USAL)
Repository:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/146636
Online Access:http://hdl.handle.net/10366/146636
Access Level:Open access
Keyword:Diffractive optical elements
Femtosecond pulse shaping
Laser arrays
Mode locking
Nonlinear optical crystals
Second harmonic generation
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spelling Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulsesMartínez-Cuenca, RaúlMendoza Yero, OmelAlonso Fernández, BenjamínSola Larrañaga, Iñigo JuanMínguez Vega, GladysLáncis, JesúsDiffractive optical elementsFemtosecond pulse shapingLaser arraysMode lockingNonlinear optical crystalsSecond harmonic generationWe present a technique for efficient generation of the second-harmonic signal at several points of a nonlinear crystal simultaneously. Multispot operation is performed by using a diffractive optical element that splits the near-infrared light of a mode-locked Ti:sapphire laser into an arbitrary array of beams that are transformed into an array of foci at the nonlinear crystal. We show that, for pulse temporal durations under 100 fs, spatiotemporal shaping of the pulse is mandatory to overcome chromatic dispersion effects that spread both in space and time the foci showing a reduced peak intensity that prevents nonlinear phenomena. We experimentally demonstrate arbitrary irradiance patterns for the second-harmonic signal consisting of more than 100 spots with a multipass amplifier delivering 28 fs, 0.8 mJ pulses at 1 kHz repetition rate.This work was supported by the Spanish Ministerio de Ciencia e Innovación (MICINN) and FEDER through the projects FIS2010-15746, FIS2009-09522, and SAUUL (CSD2007-00013) and the Fundació Caixa Castelló (P1-1B2010-26). The authors are grateful to the Serveis Centrals d’Intrumentació Científica of the Universitat Jaume I and the Centro de Láseres Pulsados, Salamanca. We are indebted to Professor Jürgen Jahns for providing us with the diffractive lenses.202120212012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10366/146636reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésFIS2010-15746FIS2009-09522CSD2007-00013P1-1B2010-26Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1466362026-06-07T06:28:51Z
dc.title.none.fl_str_mv Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
title Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
spellingShingle Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
Martínez-Cuenca, Raúl
Diffractive optical elements
Femtosecond pulse shaping
Laser arrays
Mode locking
Nonlinear optical crystals
Second harmonic generation
title_short Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
title_full Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
title_fullStr Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
title_full_unstemmed Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
title_sort Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
dc.creator.none.fl_str_mv Martínez-Cuenca, Raúl
Mendoza Yero, Omel
Alonso Fernández, Benjamín
Sola Larrañaga, Iñigo Juan
Mínguez Vega, Gladys
Láncis, Jesús
author Martínez-Cuenca, Raúl
author_facet Martínez-Cuenca, Raúl
Mendoza Yero, Omel
Alonso Fernández, Benjamín
Sola Larrañaga, Iñigo Juan
Mínguez Vega, Gladys
Láncis, Jesús
author_role author
author2 Mendoza Yero, Omel
Alonso Fernández, Benjamín
Sola Larrañaga, Iñigo Juan
Mínguez Vega, Gladys
Láncis, Jesús
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Diffractive optical elements
Femtosecond pulse shaping
Laser arrays
Mode locking
Nonlinear optical crystals
Second harmonic generation
topic Diffractive optical elements
Femtosecond pulse shaping
Laser arrays
Mode locking
Nonlinear optical crystals
Second harmonic generation
description We present a technique for efficient generation of the second-harmonic signal at several points of a nonlinear crystal simultaneously. Multispot operation is performed by using a diffractive optical element that splits the near-infrared light of a mode-locked Ti:sapphire laser into an arbitrary array of beams that are transformed into an array of foci at the nonlinear crystal. We show that, for pulse temporal durations under 100 fs, spatiotemporal shaping of the pulse is mandatory to overcome chromatic dispersion effects that spread both in space and time the foci showing a reduced peak intensity that prevents nonlinear phenomena. We experimentally demonstrate arbitrary irradiance patterns for the second-harmonic signal consisting of more than 100 spots with a multipass amplifier delivering 28 fs, 0.8 mJ pulses at 1 kHz repetition rate.
publishDate 2012
dc.date.none.fl_str_mv 2012
2021
2021
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/10366/146636
url http://hdl.handle.net/10366/146636
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv FIS2010-15746
FIS2009-09522
CSD2007-00013
P1-1B2010-26
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
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 15.300719

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