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Heterodyne ultrafast pump-probe experiments, towards acoustic imaging with 1 GHz to 100 GHz spectral range

dc.contributor.authorABBAS, Allaoua
hal.structure.identifierLaboratoire de Mécanique Physique [LMP]
dc.contributor.authorGUILLET, Yannick
dc.contributor.authorAUDOIN, Bertrand
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorRAMPNOUX, Jean-Michel
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorDILHAIRE, Stefan
dc.contributor.authorCARLIER, Julien
dc.contributor.authorRIGAIL, Pierre
dc.contributor.authorMOTTAY, Eric
dc.contributor.editorSociété Française d'Acoustique
dc.date.issued2012-04-23
dc.date.conference2012-04-23
dc.description.abstractEnUsual femtosecond pump-probe experiments allow the generation and the detection of acoustic waves in the GHz-THz frequency range for investigation of matter properties at sub-micron scales. The main drawback of these experiments is their acquisition speed limitation due to the use of mechanical delay line. We present a pump-probe heterodyne setup which uses two mode-locked lasers (400 fs FHMW pulses at nearly 50 MHz repetition rate). A controlled frequency shift (100 Hz to 1 KHz) of their repetition rates synthesized by a Phase Locked Loop permits to generate the pump-probe delay and to discard the setup of any mechanical translation stage. An accurate control of the beating frequency is needed to achieve the temporal resolution required to detect high acoustic frequencies. Any fluctuation of this beating frequency induces an uncertainty on the pump-probe delay (jitter) and reduces the system bandwidth. We will expose the metrological method allowing the measurement of this jitter, which turns out to be smaller than 500 fs. This jitter value should permit the detection of waves over a large band spectrum, from few GHz to several hundreds of GHz with a 50 MHz spectral resolution. Experimental pump-probe measurements on different physical systems will highlight this feature.
dc.language.isoen
dc.source.titleAcoustics 2012 Nantes
dc.title.enHeterodyne ultrafast pump-probe experiments, towards acoustic imaging with 1 GHz to 100 GHz spectral range
dc.typeCommunication dans un congrès
dc.subject.halSciences de l'ingénieur [physics]/Acoustique [physics.class-ph]
bordeaux.countryFR
bordeaux.title.proceedingAcoustics 2012 Nantes
bordeaux.conference.cityNantes
bordeaux.peerReviewedoui
hal.identifierhal-00811245
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2012-04-27
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00811245v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=Acoustics%202012%20Nantes&rft.date=2012-04-23&rft.au=ABBAS,%20Allaoua&GUILLET,%20Yannick&AUDOIN,%20Bertrand&RAMPNOUX,%20Jean-Michel&DILHAIRE,%20Stefan&rft.genre=unknown


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