Induced attenuation in Ce3+ and Nd3+ doped fibers irradiated with electron beams under low dose regime

In this paper, we study the feasibility of rare earth doped optical fibers as dosimeters based on the attenuation induced by electron beams under standard conditions in radiotherapy. Neodymium and cerium doped fibers have been irradiated with 10 MeV electrons, the radiation-induced loss and the dynamic response have been measured in the wavelength range 1200-1600 nm. The sensitivity of the fibers is of the order of 0.1 (dB/m)/Gy and has a linear dependence on the dose.