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dc.contributor.authorChaitanya Kumar, S.
dc.contributor.authorCanals Casals, J.
dc.contributor.authorSanchez Bautista, E.
dc.contributor.authorDevi, K.
dc.contributor.authorEbrahim-Zadeh, Majid
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.date.accessioned2015-08-04T13:55:47Z
dc.date.available2015-08-04T13:55:47Z
dc.date.issued2015-05-15
dc.identifier.issn0146-9592
dc.identifier.urihttp://hdl.handle.net/2117/76498
dc.description.abstractWe 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.
dc.format.extent5 p.
dc.language.isoeng
dc.publisherOSA
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.lcshNonlinear optics
dc.subject.otherNonlinear optics
dc.titleYb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm
dc.typeArticle
dc.subject.lemacÒptica no lineal
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.osapublishing.org/ol/abstract.cfm?uri=ol-40-10-2397
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.publicationNameOptics Letters
local.citation.volume40
local.citation.number10
local.citation.startingPage2397
local.citation.endingPage2400
local.personalitzacitaciotrue


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