基于太空环境下的光纤辐照损伤理论

Theory of radiation-induced absorption in optical fibers in space environment

为了用实验室中得到的数据来模拟光纤在太空环境中的辐照损伤情况,通过将辐照损伤效应考虑为激励及响应过程的叠加,提出了一种新的理论模型。光纤在太空环境下的可能受到的最主要的辐照情况是宇宙背景辐射和太阳耀斑。针对背景辐射均匀稳定,剂量速率较小和太阳耀斑突发、剂量速率大的特点,对激励函数进行不同处理,从而得到不同的理论模型。结果表明,综合不同模型,可得到一种可行的理论方法来预测太空中的光纤损耗。

Treating radiation-induced abs or ption as superposition of process of excitation and response, a new model is pro posed to describe the radiation-induced absorption in optical fibers in space e nvironment using the data obtained in the ground-based laboratory. There are tw o kinds of most important radiation in space environment: background radiation w hich is stable and low radiation rate and solar flare which is paroxysmal and hi gh radiation rate. Considering the different characteristics of background radia tion and solar flare, the exciting function is treated in different ways, result ing in different models. Synthesizing the different models, a new theory is obta ined out to describe the loss of optical fiber in space environment.