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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    Title :

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



    Conference:

    Advances in Fiber Optics ; 2000 ; Moscow,Russian Federation


    Published in:

    Publication date :

    2000-05-17





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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