In-situ regeneration of P-doped optical fiber dosimeter

We demonstrate the feasibility of resetting and reusing dosimeters exploiting the measurement of the infrared radiation-induced attenuation (IR-RIA) in phosphosilicate optical fibers (OFs) to provide point or distributed dose measurements in radiation environments. To bleach the room temperature sta...

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Bibliographic Details
Published in:Optics letters 2020-09, Vol.45 (18), p.5201-5204
Main Authors: Li Vecchi, Gaetano, Di Francesca, Diego, Kadi, Yacine, Ricci, Daniel, Brugger, Markus, Campanella, Cosimo, Alessi, Antonino, Ouerdane, Youcef, Girard, Sylvain
Format: Article
Language:English
Subjects:
Argon
Attenuation
Continuous radiation
Doped fibers
Dosimeters
Engineering Sciences
Infrared radiation
Optical fibers
Radiation dosage
Radiation effects
Regeneration
Room temperature
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Summary:We demonstrate the feasibility of resetting and reusing dosimeters exploiting the measurement of the infrared radiation-induced attenuation (IR-RIA) in phosphosilicate optical fibers (OFs) to provide point or distributed dose measurements in radiation environments. To bleach the room temperature stable IR-RIA, we used the photobleaching (PB) phenomenon. The PB efficiency was evaluated for different wavelengths in the [400–1100] nm range. The best identified PB resetting condition consists in using a continuous-wave Argon-ion laser at 514 nm. This treatment successfully bleached ∼ 97 % of the IR-RIA at 1550 nm of a 30 m-long P-doped single mode optical fiber X-ray irradiated at a dose of 100 Gy. Successive re-irradiations of the same OF sample, regenerated after each run, confirm that the dosimeter keeps the same calibration curve during the whole process.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.402382