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本文从光纤陀螺中主要部件保偏光纤空间应用的角度出发,利用60Co辐照源模拟空间辐照,对保偏光纤环的电离辐射效应展开研究,基于保偏光纤在不同剂量率条件下的辐照试验,探索保偏光纤随辐照剂量的变化规律。实验结果表明,累积剂量和剂量率为63Gy与0.01Gy/s、32Gy与0.02Gy/s、326Gy与0.0835Gy/s的光纤损耗分别增加1.0dB、0.55dB和5.8dB,也即保偏光纤损耗随总剂量与剂量率增大。理论分析得到的光纤辐照损耗与剂量率的关系与试验数据相吻合。本文结果可为保偏光纤电离辐射效应的地面试验提供参考。
In this paper, the main components of fiber optic gyro polarization maintaining fiber space applications point of view, the use of 60Co irradiation source simulation of space radiation, polarization-maintaining fiber ring ionizing radiation effects study, based on the polarization maintaining fiber at different dose rates under the conditions of radiation According to the test, to explore the variation of polarization maintaining fiber with irradiation dose. The experimental results showed that the cumulative loss and fiber loss increased by 1.0dB, 0.55dB and 5.8dB, respectively, at the cumulative dose and dose rates of 63Gy and 0.01Gy / s, 32Gy and 0.02Gy / s, 326Gy and 0.0835Gy / s, With the total dose and dose rate increases. The theoretical analysis of the relationship between the optical fiber loss and dose rate coincides with the experimental data. The results of this paper can provide reference for the ground test of ionizing radiation effect of polarization maintaining fiber.