聚苯乙烯塑料光纤辐照特性的实验研究

Experimental Research on Polystyrene Optical Fiber Under Irradiation

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)光纤在不同剂量的 γ射线辐照下光传输性能的变化以及其恢复特性。实验结果表明 ,在各种辐照剂量下 ,光透过率有不同程度的下降 ;在 10 3Gy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。与聚甲基丙烯酸甲脂 (PMMA)光纤辐照实验结果相比 ,发现 PS光纤显然比 PMMA光纤的抗辐照特性要好。

We analyzed the physical and chemical characteristics change of polymer under irradiation environment. The radiation damage and recovery property for polystyrene (PS) optical fiber under γ-ray irradiation was researched experimentally. Under different irradiation dose, the light transmission rate reduced by different ratio. Under low dose irradiation 103 Gy, the transmission rate reduced a little, the fiber produced lower induced loss just only 0.18 dB, and the irradiation damage can recover during a short time. When the irradiation dose reached 103 Gy, the transmission rate reduced obviously, and the recovery process is slow and can't recover completely, which indicated fiber suffered lasting damage. By comparing with previous polymethyl methacrylate (PMMA) fiber experimental results, we discovered that the anti-irradiation performance of the PS optical fiber is better than that of PMMA optical fiber.