Radiation Induced Absorption In PCS And All Silica Optical Fibres.

This study consists of measurements on effects of high energy electrons and X radiation in optical fibers. We compare the radiation damage behaviour of two pure silica core fibers with different claddings : a plastic clad silica fiber QSFA 100 μ (from F.O.I.) and a silica core F : doped silica clad fiber QSFAS 135 p(from The wavelength of interest is at 0,8 p. Two types of radiation source were used : pulsed, (linear accelerator and pulsed electron generator) and continuous (cobalt 60). With pulsed sources, data were acquired within 1 ps duration. From the experimental results that have been obtained, the PCS fiber appears to have a better radiation hardness than the all silica fiber. A "super wet" all silica fiber QSFAS 166 appears clearly to be less radiation sensitive than the "dry" all silica fiber QSFAS 135.