Radiation-Induced Attenuation in Single-Mode Phosphosilicate Optical Fibers for Radiation Detection

D. Di Francesca 1 G. Li Vecchi 1, 2 S. Girard 2 A. Alessi 2 I. Reghioua 2 A. Boukenter 2 Y. Ouerdane 2 Y. Kadi 1 M. Brugger 1
1 CERN - European Organization for Nuclear Research
2 LHC - Laboratoire Hubert Curien [Saint Etienne]
Abstract : We investigated the online radiation-induced attenuation of two single-mode optical fibers (OFs) that were X-rays irradiated with doses up to 100 kGy(SiO2) at room temperature at 10.7 Gy/s. One of the two samples was doped only with phosphorous, whereas the other was codoped with phosphorous and cerium. Both OF types are very radiation sensitive in the near-infrared (NIR) domain and of interest for applications involving radiation detection. The addition of Ce to the P-doped core lowers the radiation sensitivity of the OF and introduces a spontaneous postirradiation recovery process at room temperature, which is negligible in the purely P-doped OF. We show that the diffusion of molecular hydrogen into the OFs allows the full recovery of the NIR losses caused by radiation-induced P-related point defects. However, the radiation response of the H2-regenarated samples is substantially different from that of the pristine ones. We conclude that the H2-loading procedure cannot be at the moment considered as a valid technique for the regeneration of a depleted P-doped OF radiation sensor.
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Contributor : Sylvain Girard <>
Submitted on : Sunday, December 23, 2018 - 8:22:38 PM
Last modification on : Tuesday, December 25, 2018 - 1:09:29 AM

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UNIV-ST-ETIENNE | IOGS | PARISTECH | UNIV-PARIS-SACLAY

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D. Di Francesca, G. Li Vecchi, S. Girard, A. Alessi, I. Reghioua, et al.. Radiation-Induced Attenuation in Single-Mode Phosphosilicate Optical Fibers for Radiation Detection. IEEE Transactions on Nuclear Science, Institute of Electrical and Electronics Engineers, 2018, 65 (1), pp.126-131. ⟨10.1109/TNS.2017.2778314⟩. ⟨ujm-01964814⟩

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