In this work, the investigation of radiation response for modified cladding multimode optical fibres exposed to UV radiation (N₂ Laser) in terms of Radiation-Induced Attenuation (RIA) had been presented. The optical fibres were tapered to 65 and 60 μm then dipped into (5 wt % of Germanium to modify the cladding region. By exposing these fibres to different energies of UV irradiation, the transmission spectra were online monitored and recorded every ten seconds to analyze the attenuation changes with the increasing of the radiation dose. The experimental results revealed two points: the first point is that the sensor undergoes the RIA effect which is resulted from the interaction between the radiation and the dopant material, and the second point shows that the sensitivity increases as the diameter of the sensor decrease. From these outcomes, we can conclude that such a sensor can be employed in different dosimetry applications.

在这项工作中，研究了暴露于紫外线（N _2）的改进包层多模光纤的辐射响应已经提出了辐射致衰减（RIA）方面的激光。将光纤逐渐变细至65和60μm，然后浸入（5 wt％的锗以修饰包层区域。通过将这些光纤暴露于不同的紫外线辐射能量下，在线监测透射光谱，并每十秒钟记录一次以分析衰减随辐射剂量的增加而变化，实验结果揭示了两点：第一点是传感器经受了RIA效应，这是由于辐射与掺杂剂材料之间的相互作用而引起的，第二点表明了灵敏度根据这些结果，我们可以得出结论，这种传感器可用于不同的剂量学应用中。