Photobleaching at 1.30 microm by 1.30 microm transmitted light during and following exposure to 60.Co irradiation is evaluated at -55 degree C in undoped and doped silica fibers. It was found that photobleaching can reduce radiation-induced attenuation by a factor of ten with an irradiance as low as about 0.1 W/cm2 in fibers where the 630-nm, drawing-induced band is absent. This low-temperature photobleaching is charactized by high order recovery processes. Little photobleaching was observed in germanium doped fibers until irradiances were above 100 W/cm2.
Photoenhanced survivability of optical fibers at 1.30 microns for harsh aerospace environments
Photoverbesserte Beständigkeit von 1.30 Mikron-Glasfasern unter rauhen Flugzeugbedingungen
Proceedings of SPIE, Fibre Optics '90 ; 1314 ; 105-111
1990
7 Seiten, 11 Bilder, 1 Tabelle, 20 Quellen
Conference paper
English
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