Speaker
Description
Optical links in collider experiments provide the advantage of high speed data transmission with low mass fibers over a distance of a few hundred meters. The radiation resistances of Ge-doped multi-mode fibers are investigated in ionizing dose with Co-60 Gamma-ray. Depending on the doping substances and fabrication technologies, the radiation induced attenuation (RIA) differs very much. Fiber types of telecom grades can have the Radiation Induced Attenuation (RIA) of 0.05~dB/m with the total ionizing dose of 300~kGy(SiO2). The dose rate dependence is compared for the RIA responses in 5 Gy/hr to 1.4~kGy/hr and recovery with the Co-60 source removed. The temperature dependence shows higher RIA at lower temperature tested in -15 to 45 oC. The annealing of radiation induced defects in a few hours compatible RIA disregard the dose rate and temperature.
