High radiation hardness of a hollow core photonic bandgap fibre
Abstract
A 19-cell hollow core photonic bandgap fiber with a core diameter of 20 µm and an attenuation minimum of about 11dB/km at 1590 nm was exposed to continuous 60Co gamma radiation and pulsed electrons up to dose values of 10 Exp4 Gy and 100 Gy, respectively. The attenuation increase during continuous or after pulsed irradiation was at least 30 times or 100 times lower, respectively, than observed with the best conventional single-mode fibers. Furthermore a slight reduction of the width of the transmission band after a total gamma dose of 1.4 × 10 Exp5 Gy was observed.
