Single-mode germanosilicate-core optical fibers were fabricated by the MCVD process modified by sintering of the deposited soot in a reduced atmosphere (helium- or nitrogen- containing one). The fibers showed a higher photoinduced refractive index change and a higher efficiency of (chi) (2) formation as compared to an ordinary germanosilicate fiber. The sintering process in nitrogen and helium atmospheres was shown to increase the concentration of germanium oxygen-deficient centers. Besides, nitrogen appears to enter into the glass network in a sufficient concentration to modify the glass network and to additionally increase photosensitivity of the fibers.


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    Titel :

    Photorefractive effect and photoinduced χ(2)grating formation in germanosilicate core fibers codoped with nitrogen in MCVD process



    Kongress:

    Advances in Fiber Optics ; 2000 ; Moscow,Russian Federation


    Erschienen in:

    Erscheinungsdatum :

    2000-05-17





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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