Search results for "PICO"

showing 10 items of 343 documents

Optical Cavity-Less 40-GHz Picosecond Pulse Generator in the Visible Wavelength Range

2019

International audience; High-repetition-rate optical frequency-comb sources emitting picosecond pulses play important roles in variousscientific researches and industrial applications. Such ultrafast pulse sources are mostly generated in opticalcavities or microresonators. By means of the wavelength-conversion techniques, it is possible to transfer thecavity-based near-IR robust and compact sources to the mid-IR or to the visible wavelength regions [1-2], forwhich there is an increasing demand, for biophotonics and other applications. Here we demonstrate the generationof high-repetition-rate picosecond pulses in the visible wavelength range by using a fully optical cavity-lessconfiguration.…

[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics][PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Materials scienceMulti-mode optical fiberbusiness.industryOptical communicationSecond-harmonic generation7. Clean energylaw.inventionWavelengthOpticslawOptical cavityPicosecondPulse wavebusinessUltrashort pulse2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
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All-optical fiber-based devices for ultrafast amplitude jitter magnification

2012

International audience; We propose two fiber-based architectures that enable the all-optical magnification of ultrafast amplitude fluctuations of picosecond or femtosecond pulse trains. An increase of the fluctuations by more than one order of magnitude is experimentally achieved.

[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics][PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Materials science[ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]business.industryMagnificationPhysics::Optics02 engineering and technology01 natural sciences010309 optics020210 optoelectronics & photonicsAmplitudeOpticsFiber Bragg gratingPicosecond0103 physical sciences0202 electrical engineering electronic engineering information engineeringPhysics::Atomic and Molecular ClustersPhysics::Chemical PhysicsbusinessUltrashort pulseOrder of magnitudeComputingMilieux_MISCELLANEOUSPhotonic-crystal fiberJitter
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Supercontinuum generation by cascaded intermodal Raman and FWM processes in step-index few-mode fibers

2018

International audience; This work shows that step-index few-mode fibers can be combined with a simple microchip picosecond laser to give a multi-octave spanning supercontinuum output by cascaded Raman scattering and intermodal FWM.

[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics][PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Picosecond laserMaterials sciencebusiness.industryMode (statistics)01 natural sciencesSupercontinuum[SPI.MAT]Engineering Sciences [physics]/Materials010309 opticssymbols.namesake0103 physical sciencessymbols[SPI.OPTI]Engineering Sciences [physics]/Optics / PhotonicOptoelectronics[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]010306 general physicsbusinessRaman spectroscopyRaman scatteringComputingMilieux_MISCELLANEOUS
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Wavelength conversion and temporal compression of a pulse train using a dispersion oscillating fiber

2014

International audience; We demonstrate the generation of a picosecond pulse train taking advantage of the cross gain occurring in a dispersion oscillating fibre. The resulting frequency-converted signal is detuned by more than 20 nm from the pump and can be temporally compressed by a factor 2 compared to the input sinusoidal pump wave.

[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Materials scienceOptical fiber[ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]business.industryPhysics::OpticsCompression (physics)Signallaw.inventionOpticslawDispersion (optics)Pulse waveElectrical and Electronic EngineeringOptical frequency conversion; Detuned; pico-second pulseSinusoidal pumpbusinessUltrashort pulseBandwidth-limited pulse
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A “participação africana” num desporto olímpico: Lutas espaciais e questões de nacionalidade

2016

Cet article analyse les stratégies de reconnaissance d’une discipline olympique : le canoë de slalom. Il interroge en particulier les processus de diffusion de ce sport en Afrique en étudiant précisément sa place en tant que discipline au sein du mouvement olympique. Mais comment la diffusion d’un sport parmi les pays africains peut-elle cristalliser des enjeux nationaux ? Pour comprendre la complexité de cet objet, le remaniement des aires culturelles issues du joug des empires coloniaux est interrogé. Il s’agit d’inscrire les perceptions de la participation olympique dans les rivalités où elles s’inscrivent depuis les Indépendances. L’enquête restitue l’apport de la nationalité comme crit…

[SHS.SOCIO] Humanities and Social Sciences/Sociologyjeux olympiqueslcsh:DT1-34150507 social and economic geographycanoë050701 cultural studiesenjeux de nationalitéslcsh:Social Sciencesnations africaineslutas espaciais0601 history and archaeologyslalom[SHS.ANTHRO-SE] Humanities and Social Sciences/Social Anthropology and ethnologyquestões de nacionalidade060101 anthropology[SHS.SOCIO]Humanities and Social Sciences/Sociologycanoë; slalom; jeux olympiques; luttes spatiales; nations africaines; enjeux de nationalitésGeneral Arts and Humanities05 social sciencesjogos olímpicosGeneral Social Sciences06 humanities and the arts[SHS.ANTHRO-SE]Humanities and Social Sciences/Social Anthropology and ethnology16. Peace & justicelcsh:Hlcsh:History of Africacanoagemluttes spatialesnações africanas
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Acque di mezzo. Viaggio alla scoperta degli ambienti costieri della Sicilia: laghi, paludi, pantani, saline e stagni

2008

acque di transizione caratteristiche ecologiche ruolo ecologico impatto antropico
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Oasi di Slander

2021

L’Oasi di Slander, naturalmente, non esiste. Ma è del tutto pensabile, immaginabile, e viene in- fatti descritta, in maniera agile intelligente e creativamente perfida. È un gioco, ma non un gioco innocente, anzi crudele per le allusioni e per i sentimenti che lascia trasparire. Soprattutto è anche un lavoro di mano competente e talora geniale. Racconta, con non sempre caritatevole humour, di una “derelict land” che il Signor Slander vuole far diventare un parco in- cantato e fruibile. Non senza introdurre sconcertanti regole urbanistiche, botaniche ed altro che condurranno a imprevedibili complicazioni. È una malizia letteraria. Ma, attenzione: sembra puro divertimento per i nostri lettori…

aree protette impatto antropico banca germoplasma
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1992. La política valenciana en 1992. Broseta asesinado. Los grandes eventos de 1992

2014

Este documento recoge temas como la política valenciana en 1992, los Juegos Olímpicos de Barcelona, la Exposición Universal de Sevilla y Madrid capital europea de la cultura, junto a corrupción y crisis económica. También el asesinato de Manuel Broseta Pont en Valencia por la banda terrorista ETA, el 15 de enero de 1992; Felipe González abre el debate interno en el PSOE. Lerma ya no es guerrista. La ruptura Felipe-Guerra en el PSOE favorece el poder de Lerma. Lerma, barón en auge. Sobre el PP se incluyen los temas "El liderazgo de Aznar pierde fuelle". Pedro Agramunt, candidato perdedor. José Luis Manglano se postula al liderazgo del PPCV. El Tribunal Supremo anula las grabaciones el 'caso …

asesinato de manuel brosetaexposición universal de sevillaUNESCO::HISTORIAmadrid capital europea de la culturajuegos olímpicos de barcelona
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A Computational Based Approach for Non-invasive Localization of Atrial ectopic foci

2020

Las arritmias auriculares son las arritmias cardı́acas más comunes, afectan a seis millones de personas en Europa e imponen una enorme carga sanitaria en la sociedad. Las nuevas tecnologı́as médicas están ayudando a los electrofisiólogos a adaptar el tratamiento a cada paciente de diferentes maneras. Por ejemplo, la resonancia magnética (MRI) permite evaluar la distribución espacial de la fibrosis auricular; los mapas electroanatómicos (EAM) permiten obtener una caracterización eléctrica de los tejidos en tiempo real; Las imágenes electrocardiográficas (ECGI) permiten estudiar la actividad eléctrica cardı́aca de forma no invasiva; y la ablación por radiofrecuencia (RFA), permite eliminar el…

aurícula:MATEMÁTICAS::Ciencia de los ordenadores::Informática [UNESCO]UNESCO::MATEMÁTICAS::Ciencia de los ordenadores::Informáticaarritmias auricularesaprendizaje automáticomodelos biofísicos 3Dfocos ectópicos
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Dithiodiketopiperazine derivatives from endophytic fungi Trichoderma harzianum and Epicoccum nigrum

2021

A new epidithiodiketopiperazine (ETP), pretrichodermamide G (1), along with three known (epi)dithiodiketopiparazines (2-4) were isolated from cultures of Trichoderma harzianum and Epicoccum nigrum, endophytic fungi associated with medicinal plants Zingiber officinale and Salix sp., respectively. The structure of the new compound (1) was established on the basis of spectroscopic data, including 1D/2D NMR and HRESIMS. The isolated compounds were investigated for their antifungal, antibacterial and cytotoxic potential against a panel of microorganisms and cell lines. Pretrichodermamide A (2) displayed antimicrobial activity towards the plant pathogenic fungus Ustilago maydis and the human path…

biology010405 organic chemistryOrganic ChemistryTrichoderma harzianumPlant Sciencebiology.organism_classification01 natural sciencesBiochemistryPlant use of endophytic fungi in defense0104 chemical sciencesAnalytical Chemistry010404 medicinal & biomolecular chemistryBotanyEpicoccum nigrum
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