Title :
Radiation-induced loss of rare earth doped silica fibres
Author :
Henschel, H. ; Köhn, O. ; Schmidt, H.U. ; Kirchof, J. ; Unger, S.
Author_Institution :
Fraunhofer-INT, Euskirchen, Germany
fDate :
6/1/1998 12:00:00 AM
Abstract :
Eighteen single mode fibres doped with different Rare Earth elements are exposed to 60Co gamma radiation in order to estimate the radiation sensitivity of fibre amplifiers or fibre lasers and to find fibres with extremely high loss increase that are suited for dosimetry of low radiation levels. Induced loss measurements with varying dose rate confirmed the applicability of a simple dose rate transformation method also to Rare Earth doped fibres. Operation of a “distributed” fibre optic radiation sensor is demonstrated at a dose rate of less than 0.1 Gy/d
Keywords :
dosimetry; fibre lasers; fibre optic sensors; gamma-ray detection; gamma-ray effects; optical fibre losses; SiO2; distributed fibre optic radiation sensor; dose rate; dosimetry; fibre amplifier; fibre laser; gamma radiation; radiation-induced loss; rare earth doped silica fibre; single mode fibre; Doped fiber amplifiers; Dosimetry; Fiber lasers; Gamma rays; Laser modes; Optical fiber amplifiers; Optical fiber losses; Optical fiber sensors; Silicon compounds; Ultraviolet sources;
Journal_Title :
Nuclear Science, IEEE Transactions on
