Online Gamma Radiation Monitoring Using Few-Mode Polymer CYTOP Fiber Bragg Gratings

被引：6
作者：
Chapalo, Ivan [1 ]
Gusarov, Andrei [2 ]
Ioannou, Andreas [3 ]
Pospori, Andreas [3 ]
Chah, Karima [1 ]
Nan, Ying-Gang [1 ]
Kalli, Kyriacos [3 ]
Megret, Patrice [1 ]
机构：
[1] Univ Mons, Electromagnetism & Telecom Dept, B-7000 Mons, Belgium
[2] Belgian Nucl Res Ctr SCK CEN, B-2400 Mol, Belgium
[3] Cyprus Univ Technol, Photon & Opt Sensors Res Lab, CY-3036 Limassol, Cyprus
来源：
SENSORS | 2023年 / 23卷 / 01期
关键词：
polymer optical fiber; gamma radiation dosimetry; fiber Bragg gratings; gamma radiation; CYTOP; polymer perfluorinated fiber; OPTICAL-FIBERS; IRRADIATION;
D O I：
10.3390/s23010039
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We investigated the gamma radiation response of fiber Bragg gratings (FBGs) inscribed in a few-mode polymer optical fiber. The fiber had a graded-index CYTOP core of 20 mu m and XYLEX overclad of 250 mu m in diameter. Four FBGs were exposed to gamma radiation during four irradiation sessions at a 5.3 kGy/h dose rate. The FBGs showed a linear Bragg wavelength shift with the received dose with a mean sensitivity of -3.95 pm/kGy at 43 degrees C. The increased temperature provides a rise in the sensitivity: it reached -10.6 pm/kGy at 58 degrees C. After irradiation, the FBGs showed partial recovery, which increased with the received dose. Furthermore, the FBG's reflection power decreased with the dose. This attenuation is mainly due to insertion losses caused by the radiation induced attenuation in the CYTOP fiber. Linear response to the received dose makes CYTOP FBGs attractive for gamma radiation dosimetry. However, temperature dependence of the sensitivity should be compensated in practical applications.
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页数：12
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