分析了聚合物受辐照后发生物理化学变化的机理 ,实验研究了聚苯乙烯 (PS)、聚碳酸脂 (PC)、聚甲级丙烯酸甲脂 (PMMA)三种聚合物光纤在不同辐照剂量下光传输性能的变化以及其恢复特性 在各种辐照剂量下 ,光透过率有不同程度的下降 ,经过一段时间后也有不同程度的回复 ,并且恢复主要发生在停止辐照后的较短时间内 在 10 2 Gy以下 ,辐照造成的光损伤经过一段时间基本可以恢复 ,在更高剂量的辐照下 (超过 5 10 3Gy) ,辐照对光纤造成了永久损伤 ,经过很长时间也只能恢复一部分 实验结果表明 ,PS光纤的抗辐照特性最好 ,PC光纤优于PMMA光纤 The mechanism of the physical and chemical changes of polymer after irradiation was analyzed. The effects of three kinds of polymer optical fibers, such as polystyrene (PS), polycarbonate (PC) and polymethylmethacrylate (PMMA) The changes of light transmission performance and its recovery characteristics under different doses of radiation have different degrees of light transmittance decline, after a period of time also have different degrees of recovery, and the recovery occurred mainly in the stop after irradiation than the Under a short period of 10 2 Gy or less, the light damage caused by irradiation can be basically recovered after a period of time. At a higher irradiation dose (more than 510 3Gy), the irradiation permanently damages the optical fiber. After a long period of time Only to restore part of the experimental results show that the anti-radiation properties of PS fiber is best, PC fiber is better than PMMA fiber