双包层紫外光纤伽马辐照效应实验研究

发布时间：2018-01-05 18:17

本文关键词：双包层紫外光纤伽马辐照效应实验研究　出处：《原子能科学技术》2017年03期 　论文类型：期刊论文

【摘要】：双包层大芯径紫外石英光纤具有高的传输效率和耐辐照性,在核辐射场信号传输与测量中有良好的应用前景。但在核辐射场中,光纤受辐照会产生发光和诱导损耗,影响测量精度和准确度。为此,建立了光纤辐照损耗和发光光谱测量系统及方法,对芯径为0.2、0.4和0.6mm石英光纤在辐照剂量率为0.053 6Gy/s的稳态60 Co伽马射线源上进行了测量。实验结果表明:芯径越大,光纤辐照产生的附加损耗越小;辐照附加损耗并非与总剂量呈正比,随着辐照时间和总剂量的增加,损耗值增量逐渐减小;发光和损耗与光的波长有关,短波区光纤发光强度和损耗较长波区大;实验测量得到了0.6mm光纤在300~600nm的发光光谱,发光强度约为10~(-13)W·s/(Gy·m);相同时间内,不同波长辐照恢复效果不同,长波长损耗小,较快恢复到辐照前光纤传输效率,而短波长损耗大,恢复较慢。
[Abstract]:Double-clad large-diameter ultraviolet quartz fiber has high transmission efficiency and irradiance resistance. It has a good application prospect in nuclear radiation field signal transmission and measurement, but in nuclear radiation field. The luminescence and induced loss of optical fiber will be produced, which will affect the accuracy and accuracy of measurement. Therefore, a measurement system and method of optical fiber radiation loss and luminescence spectrum are established, the diameter of core is 0.2. 0.4 and 0.6 mm quartz fibers were measured on a steady 60Co gamma ray source with a dose rate of 0.053.6 Gy / s. The experimental results show that the larger the core diameter is, the larger the core diameter is. The smaller the additional loss caused by optical fiber irradiation; The additional loss is not proportional to the total dose, but decreases with the increase of irradiation time and total dose. The luminescence and loss are related to the wavelength of light, and the intensity and loss of optical fiber in short-wave region are larger than those in long-wave region. The photoluminescence spectra of 0.6 mm fiber at 300 ~ 600nm have been measured. The luminescence intensity is about 10 ~ (-13) W 路s ~ (-1) W 路m ~ (-1). In the same time, the effect of different wavelength irradiation recovery is different, the long wavelength loss is small, the fast recovery to the transmission efficiency of fiber before irradiation, but the short wavelength loss is large, the recovery is slower.
【作者单位】：西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室;西安交通大学能源与动力工程学院;中国电子集团第八研究所;
【基金】：国家自然科学基金资助项目(11275155)
【分类号】：TN253
【正文快照】： 在快脉冲信号传输技术方面,光纤与同轴电缆相比,具有频带宽、传输容量大、损耗低、抗电磁干扰能力强等优点,已在工业、军事等领域得到广泛应用。然而当受到核辐射时,光纤的光学参数将发生变化,光纤系统的性能也将随之恶化。如何评价在核辐射环境中光纤系统的性能,实现光纤的抗

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