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Proceedings Paper

Response of long period gratings to gamma and neutron-gamma radiations
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Paper Abstract

Here, we report a comparative experimental investigation about the radiation sensitivity of Long Period Gratings (LPGs), fabricated in several optical fibers (from standard to radiation hardened ones) by electric arc discharge technique. For the purpose, similar set of gratings were tested under two different conditions. One is gamma radiation produced by a 60Co source using a 0.2 kGy/h dose rate and up to 25-35 kGy total doses. The other is mixed neutron-gamma exposure in a nuclear reactor at 9 Gy/s gamma-rate and 1.25∙1012 n/(cm2 ∙s) neutron flux, reaching a total gamma dose of about 65 kGy and neutron fluence of 9.18∙1015 n/cm2 . The analysis was focused on the real-time radiation-induced wavelength shift exhibited by the gratings. As an outcome, the responses of the LPGs subjected to the different radiations were compared and correlated with fiber compositions.

Paper Details

Date Published: 28 August 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990B (28 August 2019); doi: 10.1117/12.2539791
Show Author Affiliations
Flavio Esposito, Univ. degli Studi di Napoli Parthenope (Italy)
Andrei Stăncălie, Institutul National pentru Fizica Laserilor, Plasmei si Radiatiei (Romania)
Daniel Neguţ, Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara Horia Hulubei (Romania)
Agostino Iadicicco, Univ. degli Studi di Napoli Parthenope (Italy)
Dan Sporea, Institutul National pentru Fizica Laserilor, Plasmei si Radiatiei (Romania)
Stefania Campopiano, Univ. degli Studi di Napoli Parthenope (Italy)


Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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