为了比较3种聚合物光纤在γ射线辐照下的辐照损伤特性的不同，通过分析3种聚合物光纤在辐照环境下的物理化学变化，并测量了聚甲基丙烯酸甲脂、聚碳酸脂、聚苯乙烯3种光纤在不同剂量γ射线辐照下可见光波段的辐照光谱，得到3种光纤辐照损伤特性的定量结果。在0．1kGy和1kGy辐照剂量时，3种光纤的透过率光谱趋势类似，整个可见光波段透过率光谱都较平坦；在5kGy和10kGy辐照剂量时，测得的辐照光谱在不同波长段出现峰值，辐照剂量越高，剂量率越大，光谱的峰值效果越明显，透过率起伏越多，透过率峰值也向长波段偏移。结果表明，光纤的辐照损伤和恢复都有波长相关性，这对核辐照环境下使用塑料光纤有很好的参考作用。

In order to compare the irradiation damage difference of three polymer optical fiber(POF),by analyzing the physical and chemical changes of polymethylmethacrylate(PMMA),polystyrene(PS)and polycarbonate(PC)optical fiber under γ-ray irradiation and measuring the transmission rate of three POFs under different dose γ-ray irradiation,the quantitative irradiation damage results is given. Under lower dose 0.1kGy and 1kGy,the transmission curves of three kinds of POF are flat in the whole visible light range. When the irradiation dose is 5kGy and lOkGy,the three transmission rates have evident peak value in the different wavelength range. The high the dose is,the more evident the peak effect is,and transmission curves become fluctuating,moreover,the peak value wavelength move to longer wavelength. The results indicated that the radiaton damage of three kinds of POF was wavelength-dependent,which is good reference to applying POF in nuclear radiation environment.