Abstract
In this work, the performance of single-mode optical fibers (SMFs) for ultraviolet (UV) radiation monitoring and dosimetry applications is presented. In particular, this work will focus on the Radiation-Induced Absorption (RIA) phenomena in the Near-Infrared domain (NIR). Such phenomena play a very important role in the sensing mechanism for SMF. Single mode fibers with a diameter of 50 µm were used for this purpose. These fibers were dipped into germanium (Ge) solution with different concentrations (1, 3, and 5 wt%) to produce the sensing part of the sensor. For all optical fiber sensors under investigation, the results indicated the dependence of the RIA on the applied UV radiation energy. Also, a redshift in peak wavelength was obtained. The influence of Ge concentration on sensing efficiency was studied and the best results were obtained with 3 wt% concentration as compared to 1 wt % and 5 wt % concentrations. The presented sensor shows good sensitivity to UV radiation which makes it possible to be applied in medical applications.
Highlights
Dosimeters are devices that are utilized for radiation monitoring and measuring
The transmission spectra were monitored and recorded online for different optical fiber sensors dipped with different Ge concentrations (1, 3, 5 wt%)
The Radiation-Induced Absorption (RIA) patterns for different radiation-sensitive single-mode optical fiber sensors were characterized under UV radiation in the Near-Infrared domain (NIR) region
Summary
Dosimeters are devices that are utilized for radiation monitoring and measuring. Different information could be collected through them due to the radiation nature and characteristics [1]. Optical Fiber Dosimeter Sensors (OFDS) have impressive characteristics that render them very important devices in detecting radiation compared to other ones [2]. Their immunity to electromagnetic radiation, ability to monitor the doses remotely in harsh environments and water resistance, small size, and cheap price, in addition to their availability in the commercial markets, are considered as the most unique characteristics of OFDS [3]. The OFDS have many applications, especially in the medical fields, like cancer treatment by measuring the radiation dose under different conditions through radiation therapy [4]. These treatments must be very accurate to give the desired dose in the desired location without affecting the surrounding healthy tissue [5]
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