@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00080477v1> a dcat:Dataset ;
    dct:description """
              The topic of this work deals with theoretical and experimental study<br />of the control of ultrashort pulse coherent propagation in optically<br />dense medium. First, we describe the basics of propagation<br />phenomena. The optical thickness characterizes the importance of the<br />temporal distortion of the pulse profile. As prisms or gratings<br />compressors are used to cancel the dispersion of transparent medium,<br />we show that a high resolution pulse shaper can compensate for the<br />resonant dispersion. Secondly, we study the idea of using a strong<br />driving pulse, to control the transient properties of a weak<br />resonant pulse simultaneously propagating in the medium. The strong<br />field induces transient modifications in the medium, that modify via<br />radiation the electric field of the weak resonant propagating pulse.<br />In a three level ladder system, modulations appear on the intensity<br />profile, and reveal the light shift induced (off resonance) on the<br />two upper levels. Their characteristic duration is shorter than the<br />initial pulse duration : new components thus appear on the<br />transmitted spectrum. These oscillations are the consequence of the<br />beating between the incident and the radiated field whose frequency<br />sweeps in time, following the light shift. In the bichromatic<br />excitation of a two level system, two spatial configurations give<br />access to different information. Besides the previous phenomena<br />appearing in non collinear geometry, the non adiabatic transitions<br />induced by the driving field are also involved in collinear<br />interaction. A weak pulse can be used as a very sensitive probe to<br />these effects. Finally, we study a configuration where two<br />orthogonally polarized pulses, excite resonantly a four level system<br />degenerated two by two. With the strong field mixing the states, the<br />emission and absorption path of the weak field have similar<br />contribution. The two paths interfere thus modulating the<br />transmitted pulse energy. The interplay of the light shift and the<br />interference, enables us to control the gain and the pulse temporal<br />shape as well.
            """ ;
    dct:identifier "tel-00080477" ;
    dct:issued "2026-05-12T03:47:29.237505"^^xsd:dateTime ;
    dct:language "fr" ;
    dct:modified "2026-05-12T03:47:29.237510"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "CONTROL OF ULTRASHORT PULSES PROPAGATION. <br />EFFECTS OF LIGHT SHIFTS." ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
    dcat:distribution <https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00080477v1/resource/4513f480-cd0e-4be1-a6e7-1b38dc1facee> ;
    dcat:keyword "br-oscillations-de-rabi",
        "br-quantum-path-interferences",
        "chirped-pulses",
        "coherent-pulse-propagation",
        "coherent-transients",
        "franges-de-ramsey",
        "impulsions-a-derive-de-frequence",
        "infoeu-reposemanticsdoctoralthesis",
        "interferences-de-cheminsbr-quantiques",
        "milieu-optiquement-dense",
        "mise-en-forme-dimpulsion",
        "opticallybr-dense-medium",
        "physphysphys-atom-phphysics-physicsphysics-physicsatomic-physics-physicsatom-ph",
        "propagation-coherente",
        "pulse-shaping",
        "rabi-oscillations",
        "ramsey-fringes",
        "theses",
        "transitoiresbr-coherents" ;
    dcat:landingPage <https://theses.hal.science/tel-00080477> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00080477v1/resource/4513f480-cd0e-4be1-a6e7-1b38dc1facee> a dcat:Distribution ;
    dct:format "HTML" ;
    dct:issued "2026-05-12T03:47:29.359714"^^xsd:dateTime ;
    dct:modified "2026-05-12T03:47:29.172851"^^xsd:dateTime ;
    dct:title "CONTROL OF ULTRASHORT PULSES PROPAGATION. <br />EFFECTS OF LIGHT SHIFTS." ;
    dcat:accessURL <https://theses.hal.science/tel-00080477> .

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<https://theses.hal.science/tel-00080477> a foaf:Document .