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Influence of F-doped silica cladding on the radiation hardness of SM-fibres with undoped silica core


MacGeehin, P. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fibre optics '90
Bellingham/Wash.: SPIE, 1990 (SPIE Proceedings Series 1314)
ISBN: 0-8194-0365-2
Fibre Optics and Optoelectronics <8, 1990, London>
Conference Paper
Fraunhofer INT ()
continuous irradiation; fluorine doped cladding; fluorine influence; optical fibres; pulsed irradiation; radiation hardness

Three SM-preforms with the same undoped OH-rich core material and different fluorine content in the cladding are produced. From these preforms SM-fibers with different diameter are drawn and characterized by fiber diameter, cut-off wavelength, and effective V-parameter at 850 nm. The fibers are tested under continuous 60Co-irradiation and pulsed irradiation. All measurements are performed at about 850 nm wavelength and room temperature. Due to different power distributions in SM-fibers with different V-parameters, the influence of radiation induced attenuation in the fluorine doped silica cladding is examined and the dependence of this attenuation on the fluorine concentration is shown. In addition MM-fibers with same core material are irradiated as a reference for the core material.