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On-site Regeneration Technique for Hole-Assisted Optical Fibers Used In Nuclear Facilities

Girard, Sylvain and Di Francesca, Diego and Boukenter, Aziz and Robin, Thierry and Marin, Emmanuel and Ladaci, Ayoub and Reghioua, Imène and Morana, Adriana and Rizzolo, Serena and Cangialosi, Chiara and Planes, Isabelle and Michalon, Jena-Yves and Marcandella, Claude and Paillet, Philippe and Gaillardin, Marc and Raine, Mélanie and Richard, Nicolas and Cadier, Benoît and Ouerdane, Youcef On-site Regeneration Technique for Hole-Assisted Optical Fibers Used In Nuclear Facilities. (2015) IEEE Transactions on Nuclear Science, 62 (6). 2941-2947. ISSN 0018-9499

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Official URL: https://doi.org/10.1109/TNS.2015.2484353

Abstract

In this paper, we demonstrate and highlight a proof of concept for the feasibility of an innovative technique to regenerate on-site irradiated optical fiber links in nuclear facilities. Using Hole-Assisted optical fibers (HAOF), a longitudinal gas-loading is easy to perform thanks to the fibers' dedicated holes located in the outer part of the cladding. All along the fiber length, gas ( H2 or D2) diffuses from the holes into the silica matrix, interacts with radiation induced point defects and passivates them, reducing the Radiation Induced Attenuation (RIA) levels. The validity of our approach is demonstrated considering the changes occurring at infrared wavelengths during the H2 treatment of a MGy irradiated single mode Ge-doped HAOF. Within just a few hours, a reduction of about 50% is observed for the RIA at 1550 nm of the 10 MGy irradiated HAOF, acting only from one of its two ends. An additional study is done on a set of fibers with various core dopants (F, Ge, P) and without holes to give an overview of the pertinence of developing HAOF fibers with these dopants for various applications. Using HAOF and this recovery technique appears very promising for samples based on pure-silica, Ge or F-doped cores and operating in the ultraviolet-visible spectral domains such as plasma diagnostics. This approach exhibits another interesting feature which may be extension to higher dose ranges and lifetime of P-doped distributed dosimeters used in high energy physics facilities or nuclear power plants.

Item Type:Article
Additional Information:Thanks to the IEEE (Institute of Electrical and Electronics Engineers). This paper is available at : https://ieeexplore.ieee.org/document/7348782 “© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
HAL Id:hal-02068164
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut d'optique Graduate School - IOGS (FRANCE)
Other partners > Université Jean Monnet - St Etienne (FRANCE)
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Deposited On:14 Mar 2019 15:11

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