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12 March 2020 Application of plasma absorption method in transient radiation-induced loss analysis of optical fibers
Fuhua Liu, Yuanxia Gong, Ping Wang, Jin Zhang, Chong Zhao
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Proceedings Volume 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 1143611 (2020) https://doi.org/10.1117/12.2556318
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China
Abstract
The radiation effect of gamma rays on optical fibers is introduced. The experiments of measuring the induced loss of optical fibers by steady-state and transient gamma rays are carried out. The electron density, collision frequency and plasma oscillation frequency of optical fibers under high dose rate pulsed gamma radiation are calculated. A transient radiation-induced loss model based on low temperature plasma absorption is proposed. The transient radiation-induced loss of optical fibers at 600-1600 nm is calculated and measured. The results show that: (1) At the wavelength of 1310 and 1550 nm, the results calculated on plasma absorption method and measured results of transient radiation-induced loss of optical fibers are in the same order of magnitude, and the experimental results verify the applicability of the plasma absorption model; (2) Plasma absorption and atomic defect absorption coexist when pulsed gamma rays act on optical fibers. The transient radiation-induced loss of optical fibers is the result of the interaction of two mechanisms; (3) In the range of 600-1600 nm, with the increase of detection wavelength, the radiation-induced loss of optical fibers is dominated by plasma absorption.
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Fuhua Liu, Yuanxia Gong, Ping Wang, Jin Zhang, and Chong Zhao "Application of plasma absorption method in transient radiation-induced loss analysis of optical fibers", Proc. SPIE 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 1143611 (12 March 2020); https://doi.org/10.1117/12.2556318
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KEYWORDS
Optical fibers
Absorption
Plasma
Color centers
Gamma radiation
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