Radiation tolerant fiber Bragg gratings for high temperature monitoring at MGy dose levels

A. Morana; S. Girard; E. MarinC. MarcandellaP. PailletJ. PerisseJ.-R. MaceA. BoukenterM. CannasY. Ouerdane

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Radiation tolerant fiber Bragg gratings for high temperature monitoring at MGy dose levels

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We report a method for fabricating fiber Bragg gratings (FBG) resistant to very severe environments mixing high radiation doses (up to 3 MGy) and high temperatures (up to 230℃). Such FBGs have been written in two types of radiation resistant optical fibers (pure-silica and fluorine-doped cores) by exposures to a 800 nm femtosecond IR laser at power exceeding 500 mW and then subjected to a thermal annealing treatment of 15 min at 750℃. Under radiation, our study reveals that the radiation induced Bragg wavelength shift (BWS) at a 3 MGy dose is strongly reduced compared to responses of FBGs written with nonoptimized conditions. The BWS remains lower than 10 pm for temperatures of irradiation ranging from 25℃ to 230℃ without noticeable decrease of the FBG peak amplitude. For an applicative point of view, this radiation induced BWS corresponds to an additional error on the temperature measurements lower than 1.5℃, opening the way to the development of radiation-tolerant multi-point temperature sensors for nuclear industry.

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《Optics Letters》 |2014年第18期|5313-5316|共4页
作者
A. Morana; S. Girard; E. MarinC. MarcandellaP. PailletJ. PerisseJ.-R. MaceA. BoukenterM. CannasY. Ouerdane;
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Laboratoire Hubert Curien, Universite Jean Monnet, CNRS UMR 5516, 18 Rue Prof. B. Lauras, 42000 Saint-Etienne, France;

CEA, DAM, DIF, F91297 Arpajon, France;

Areva NP, 10 rue Juliette Recamier, 69456 Lyon Cedex 06, FranceAreva, Tour Areva, 1 place Jean Millier, 92084 Paris La defense Cedex, FranceDipartimento di Fisica e Chimica, Universita di Palermo, via Archirafi 36, 90123 Palermo, Italy;

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正文语种英语
中图分类计量学;
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Radiation tolerant fiber Bragg gratings for high temperature monitoring at MGy dose levels

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