γ辐射对光纤色散的影响

发布时间：2018-01-06 13:12

本文关键词：γ辐射对光纤色散的影响　出处：《红外与激光工程》2016年01期 　论文类型：期刊论文

【摘要】：提出了基于能量沉积的γ辐射对光纤折射率的影响分析方法,计算了光纤的色散变量随光纤的V参数、折射率变化,开展了γ辐射对光纤色散影响的测量实验,得到了光纤的色散系数随辐射剂量变化数据。实验及理论计算结果表明:(1)光纤的色散系数随γ辐射剂量的增加而增大,在一定的剂量(0~500 Gy)范围内,光纤色散增加量呈逐渐饱和趋势;(2)γ辐射导致光纤折射率发生变化,从而引起材料色散的变化,辐射效应中的电子密度增大是折射率改变的主要因素;(3)辐射感生损耗引起的信号幅度降低要比辐射感生色散引起的脉冲展宽明显,对于暴露在核辐射环境中的长距离光纤,其脉冲信号产生的畸变是两者同时存在并共同作用的结果。
[Abstract]:Method to analyze the effects on the optical fiber refractive index of energy deposition of gamma radiation based on dispersion optical fiber with variable V parameters of optical fiber is calculated. The refractive index measurement experiment was carried out on the dispersion effect of gamma radiation, the dispersion coefficient of the fiber with the radiation dose change data. Experimental and theoretical calculation results show that: (1) increase the dispersion coefficient of the fiber with the gamma radiation dose increased, in a dose range (0~500 Gy), increasing the amount of fiber dispersion was gradually saturated trend; (2) gamma radiation causes refractive index change caused by the change from the material dispersion, the electron density increased in the radiation effect is the main factor of refractive index change; (3) radiation signal amplitude loss caused by lower than the radiation induced dispersion induced pulse broadening was exposed to nuclear radiation environment in the long distance optical fiber, the pulse signal The resulting distortion is the result of both the simultaneous existence and interaction of the two.

【作者单位】：西北核技术研究所激光与物质相互作用国家重点实验室;
【基金】：国家自然科学基金(11275148)
【分类号】：TN253
【正文快照】： 0引言损耗(loss)和色散(dispersion)是表征光纤性能的主要参数,是光纤固有的性质,也是影响快脉冲信号在光纤中传输性能的主要因素[1-4]。光纤的损耗直接决定着光波信号的幅度衰减量,而色散则会影响脉冲光波信号的时间宽度。γ辐射光子对普通融石英光纤的电磁作用以康普顿(Comp

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