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Near-IR Radiation-Induced Attenuation of Aluminosilicate Optical Fibers
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2021-03-09 , DOI: 10.1002/pssa.202000807
Antonino Alessi 1, 2 , Angela Guttilla 3 , Simonpietro Agnello 3 , Camille Sabatier 2 , Thierry Robin 4 , Alexandre Barnini 4 , Diego Di Francesca 2, 5 , Gaetano Li Vecchi 2, 5 , Marco Cannas 3 , Aziz Boukenter 2 , Youcef Ouerdane 2 , Sylvain Girard 2
Affiliation  

The X-ray radiation-induced attenuation (RIA) growth kinetics are studied online in different single-mode aluminosilicate optical fibers in the near-IR (NIR) domain to evaluate their potential in terms of dosimetry. The optical fibers differ by Al contents, core sizes, drawing parameters, and also by a preform deposition process. The data show no dependence of the RIA on all these parameters, a positive result for the design of point or distributed radiation detectors exploiting RIA to monitor the dose. The RIA growth rate is unchanged for dose rates changing from 0.073 to 6.25 Gy(SiO2) s−1, and the RIA linearly increases with the dose up to 2 kGy(SiO2). Small but noticeable RIA changes are observed when the irradiation temperature increases up to 50 °C during successive irradiation runs. Such results, and the post-irradiation RIA recovery, have to be considered for the application, as they can affect the dose measurement accuracy. Finally, the spectral analysis shows no dependence of the spectral shape on the fiber and irradiation parameters. As a consequence, the data reported at 1310 and 1550 nm give information not only for the RIA kinetics at telecommunications and sensor wavelengths but also for the whole NIR range often used fiber-based technologies.

中文翻译:

铝硅酸盐光纤的近红外辐射衰减

在近红外 (NIR) 域中的不同单模铝硅酸盐光纤中在线研究 X 射线辐射诱导衰减 (RIA) 生长动力学,以评估它们在剂量学方面的潜力。光纤因铝含量、纤芯尺寸、拉制参数以及预制件沉积工艺而异。数据显示 RIA 不依赖于所有这些参数,这对于利用 RIA 监测剂量的点式或分布式辐射探测器的设计来说是一个积极的结果。当剂量率从 0.073 变为 6.25 Gy(SiO 2 ) s -1 时,RIA 生长速率没有变化,并且 RIA 随剂量增加至 2 kGy(SiO 2)。当在连续辐照运行期间辐照温度升高至 50 °C 时,观察到微小但显着的 RIA 变化。在应用中必须考虑此类结果和辐照后 RIA 恢复,因为它们会影响剂量测量的准确性。最后,光谱分析表明光谱形状不依赖于光纤和辐射参数。因此,在 1310 和 1550 nm 处报告的数据不仅提供了电信和传感器波长处的 RIA 动力学信息,还提供了经常使用的基于光纤的技术的整个 NIR 范围的信息。
更新日期:2021-03-09
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