Bragg grating fabrication in germanosilicate fibers by use of near-UV light: a new pathway for refractive-index changes

Using 334-nm light, we demonstrate side writing of Bragg gratings with an index change of ~10(-4) in germanium-doped fibers. No hydrogen loading of the fibers was required. These gratings have the same temperature stability as gratings fabricated with 240-nm light. Our results suggest that photoioni...

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Bibliographic Details
Published inOptics letters Vol. 22; no. 14; p. 1086
Main Authors Starodubov, D S, Grubsky, V, Feinberg, J, Kobrin, B, Juma, S
Format Journal Article
LanguageEnglish
Published United States 15.07.1997
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Summary:Using 334-nm light, we demonstrate side writing of Bragg gratings with an index change of ~10(-4) in germanium-doped fibers. No hydrogen loading of the fibers was required. These gratings have the same temperature stability as gratings fabricated with 240-nm light. Our results suggest that photoionization is not needed for formation of gratings in Ge-doped glass. We observe an enhancement of the 334-nm photosensitivity in boron-codoped fibers and suggest that B facilitates a structural transformation of the glass.
ISSN:0146-9592
DOI:10.1364/ol.22.001086