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在辐照环境下,光纤的光传输特性因辐照引起的缺陷及色心的形成而恶化,光纤的抗辐照性能直接影响其在辐照环境下的应用。而光纤本身在形成色心的同时,存在着光、热等褪色恢复效应,且光褪色与光纤中传输光有关,光功率越强,波长越短,褪色效果越明显。利用该特点,人为的向光纤中注入短波长强光,可增强光褪色效果,减少光纤因辐照产生的损耗量,实现光纤辐照损耗的主动恢复,保偏光纤在辐照下的光褪色实验给出了有力的证明。据此提出了主动恢复效应和基于该效应利用两个光源主动增强光纤抗辐照性能的设计方法,并对其实际应用价值进行了探讨。
Under irradiation environment, the optical transmission characteristics of optical fibers are deteriorated due to the defects caused by irradiation and the formation of color centers. The anti-radiation performance of optical fibers directly affects their application in irradiation environment. While the optical fiber itself forms the color center, there exists the fading recovery effect of light and heat, and the light fading is related to the transmission light in the optical fiber. The stronger the optical power, the shorter the wavelength, the more obvious the fading effect. The use of this feature, the artificial injection of short-wavelength light into the fiber light can enhance the light fading effect, reducing the fiber due to radiation loss, to achieve the active recovery of optical fiber radiation loss, polarization-maintaining optical fiber fading under irradiation The experiment gives a strong proof. Based on this, an active recovery effect and a design method of using two light sources to actively enhance the anti-radiation performance of the optical fiber are proposed. The practical application value is also discussed.