Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm

We report a compact, stable, high-power, picosecond ultraviolet (UV) source at 266 nm based on simple single-pass two-step fourth-harmonic generation (FHG) of a mode-locked Yb-fiber laser at 79.5 MHz in LiB3O5 (LBO) and β-BaB2O4. Using a 30-mm-long LBO crystal for single-pass second-harmonic generat...

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Detalles Bibliográficos
Autores: Chaitanya Kumar, S., Canals Casals, J., Sanchez Bautista, E., Devi, K., Ebrahim-Zadeh, Majid
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/76498
Acceso en línea:https://hdl.handle.net/2117/76498
Access Level:acceso abierto
Palabra clave:Nonlinear optics
Òptica no lineal
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spelling Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nmChaitanya Kumar, S.Canals Casals, J.Sanchez Bautista, E.Devi, K.Ebrahim-Zadeh, MajidNonlinear opticsNonlinear opticsÒptica no linealWe report a compact, stable, high-power, picosecond ultraviolet (UV) source at 266 nm based on simple single-pass two-step fourth-harmonic generation (FHG) of a mode-locked Yb-fiber laser at 79.5 MHz in LiB3O5 (LBO) and β-BaB2O4. Using a 30-mm-long LBO crystal for single-pass second-harmonic generation, we achieve up to 9.1 W of average green power at 532 nm for 16.8 W of Yb-fiber power at a conversion efficiency of 54% in 16.2 ps pulses with a TEM00 spatial profile and passive power stability better than 0.5% rms over 16 h. The generated green radiation is then used for single-pass FHG into the UV, providing as much as 1.8 W of average power at 266 nm under the optimum focusing condition in the presence of spatial walk-off, at an overall FHG conversion efficiency of ∼11%. The generated UV output exhibits passive power stability better than 4.6% rms over 1.5 h and beam pointing stability better than 84 μrad over 1 h. The UV output beam has a circularity of >80% in high beam quality with the TEM00 mode profile. To the best of our knowledge, this is the first report of picosecond UV generation at 266 nm at megahertz repetition rates.Peer ReviewedOSA20152015-05-1520152015-08-04journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/76498reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/764982026-05-27T15:37:01Z
dc.title.none.fl_str_mv Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
title Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
spellingShingle Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
Chaitanya Kumar, S.
Nonlinear optics
Nonlinear optics
Òptica no lineal
title_short Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
title_full Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
title_fullStr Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
title_full_unstemmed Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
title_sort Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
dc.creator.none.fl_str_mv Chaitanya Kumar, S.
Canals Casals, J.
Sanchez Bautista, E.
Devi, K.
Ebrahim-Zadeh, Majid
author Chaitanya Kumar, S.
author_facet Chaitanya Kumar, S.
Canals Casals, J.
Sanchez Bautista, E.
Devi, K.
Ebrahim-Zadeh, Majid
author_role author
author2 Canals Casals, J.
Sanchez Bautista, E.
Devi, K.
Ebrahim-Zadeh, Majid
author2_role author
author
author
author
dc.subject.none.fl_str_mv Nonlinear optics
Nonlinear optics
Òptica no lineal
topic Nonlinear optics
Nonlinear optics
Òptica no lineal
description We report a compact, stable, high-power, picosecond ultraviolet (UV) source at 266 nm based on simple single-pass two-step fourth-harmonic generation (FHG) of a mode-locked Yb-fiber laser at 79.5 MHz in LiB3O5 (LBO) and β-BaB2O4. Using a 30-mm-long LBO crystal for single-pass second-harmonic generation, we achieve up to 9.1 W of average green power at 532 nm for 16.8 W of Yb-fiber power at a conversion efficiency of 54% in 16.2 ps pulses with a TEM00 spatial profile and passive power stability better than 0.5% rms over 16 h. The generated green radiation is then used for single-pass FHG into the UV, providing as much as 1.8 W of average power at 266 nm under the optimum focusing condition in the presence of spatial walk-off, at an overall FHG conversion efficiency of ∼11%. The generated UV output exhibits passive power stability better than 4.6% rms over 1.5 h and beam pointing stability better than 84 μrad over 1 h. The UV output beam has a circularity of >80% in high beam quality with the TEM00 mode profile. To the best of our knowledge, this is the first report of picosecond UV generation at 266 nm at megahertz repetition rates.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-05-15
2015
2015-08-04
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/76498
url https://hdl.handle.net/2117/76498
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv OSA
publisher.none.fl_str_mv OSA
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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