中文摘要：

为了研究γ射线辐照对石英光纤的影响，实验研究了单模石英光纤在不同γ射线辐照条件下，回波损耗、偏振相关损耗、散射损耗、吸收损耗、模场分布以及导模传播常数等光学参数的变化。利用X射线衍射技术测试了光纤辐照前后的密度变化。利用相干光干涉和光激励热驰豫效应，开发了一种新的光热相移技术，为光纤抗辐照加固研究提供了一定的实验参考。

英文摘要：

In order to study the impact of γ-ray radiation on silica fiber, single-mode quartz fiber at different γ-ray radiation conditions are studied experimentally from following several aspects： return loss, polarization dependent loss, scattering loss, absorption loss, mode field distribution and the guided-mode propagation constants. Density changes of optical fiber before and after radiation are tested by X-ray diffraction. A new solar thermal phase-shifting technique is developed by using coherent light interference and light stimulate thermal relaxation effect, which providing some experimental reference for the reaserch of antiradiation-hardened fiber.