Enhanced photosensitivity has been achieved in tin-doped silica optical fibers. Refractive index modulations (similar to3.10(-4)) have been achieved by use of 248 nm UV radiation. Studies performed on preform slides proved that the refractive index change can be ascribed to structural rearrangements induced by photochemical reactions. The modified structure has shown extreme stability, and gratings written in this fiber start to be erased above 600 degreesC. Exposure of the fiber to 255 nm laser radiation showed that, at high fluence, the refractive index modulation saturates and does not exhibit any sign of decrease.
Brambilla, G., Pruneri, V., Reekie, L., Paleari, A., Chiodini, N., Booth, H. (2001). High photosensitivity in SnO2:SiO2 optical fibers. FIBER AND INTEGRATED OPTICS, 20(6), 553-564 [10.1080/014680301317080990].
High photosensitivity in SnO2:SiO2 optical fibers
PALEARI, ALBERTO MARIA FELICE;CHIODINI, NORBERTO;
2001
Abstract
Enhanced photosensitivity has been achieved in tin-doped silica optical fibers. Refractive index modulations (similar to3.10(-4)) have been achieved by use of 248 nm UV radiation. Studies performed on preform slides proved that the refractive index change can be ascribed to structural rearrangements induced by photochemical reactions. The modified structure has shown extreme stability, and gratings written in this fiber start to be erased above 600 degreesC. Exposure of the fiber to 255 nm laser radiation showed that, at high fluence, the refractive index modulation saturates and does not exhibit any sign of decrease.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.