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Bi:SiO2 fiber drawn under oxidizing conditions shows ultra-low photosensitivity and no NIR luminescence under 1064 nm pumping. Hydrogen loading followed by ArF irradiation induced both. The increase of photosensitivity and the creation of luminescence centers seem to be linked to the reduction of Bi3+.
Christian André Clément Lafforgue
Jan Van Herle, Hossein Pourrahmani