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              In this thesis, I present my works on the fabrication, the characterization and the use of optical microfibres. Microfibres are optical fibres drawn down to sub-wavelength diameters by a temperature controlled process. Due to their small dimensions, microfibers have very special properties such as a high confinement of the electromagnetic field, a enhanced non-linear coefficient and a large evanescent tail. These properties are studied in the first chapter, after which a description of the techniques used for the drawing and manipulation of the microfibres is given. Next, we present our experiments on non-linear effects in silica microfibres. In particular, we show that it is possible to generate green light with a pump at 1:55μm thanks to phase-matched third harmonic generation. In order to obtain higher efficiency in this field, the opportunity of drawing microfibres with highly non-linear glasses is discussed. A model of a microfibre laser using erbium doped tellurite glass is also presented. In the last chapter, microfibres are studied in the near field, with a scanning near field optical microscope, revealing the inner characteristics of the propagation in microfibres.
            """ ;
    dct:identifier "NNT: 2011DIJOS032" ;
    dct:issued "2026-05-20T13:53:36.954797"^^xsd:dateTime ;
    dct:language "fr" ;
    dct:modified "2026-05-20T13:53:36.954804"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Microfibres for nonlinear optics" ;
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    dcat:keyword "champ-proche",
        "dispositifs-optiques",
        "infoeu-reposemanticsdoctoralthesis",
        "micro-optique",
        "microfibres",
        "no-english-keywords",
        "non-lineaire",
        "optique-guidee",
        "physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother",
        "spiotherengineering-sciences-physicsother",
        "theses" ;
    dcat:landingPage <https://theses.hal.science/tel-00692071> .

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    dct:issued "2026-05-20T13:53:36.967614"^^xsd:dateTime ;
    dct:modified "2026-05-20T13:53:36.920474"^^xsd:dateTime ;
    dct:title "Microfibres for nonlinear optics" ;
    dcat:accessURL <https://theses.hal.science/tel-00692071> .

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