Open AccessReal-time analysis of arc-induced Long Period Gratings under gamma irradiation
Author(s) -
Flavio Esposito,
Rajeev Ranjan,
Andrei Stǎncǎlie,
Dan Sporea,
Daniel Neguţ,
Nicu Becherescu,
Stefania Campopiano,
Agostino Iadicicco
Publication year - 2017
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep43389
Subject(s) - materials science , irradiation , refractive index , optical fiber , radiation , optics , core (optical fiber) , electric arc , wavelength , sensitivity (control systems) , arc (geometry) , optoelectronics , analytical chemistry (journal) , composite material , electrode , chemistry , mathematics , physics , geometry , chromatography , electronic engineering , nuclear physics , engineering
In this paper, we present a comparative experimental and theoretical study on gamma radiation sensitivity of Long Period Gratings (LPGs), fabricated by electric arc discharge technique, as monitored in three single mode optical fibers supplied by different manufacturers. A real-time measurement of LPGs’ wavelength shift was performed until a total dose of 35 kGy was reached, with average dose rate of 0.18 kGy/h, the irradiation being done at room temperature. In one case, a maximum radiation sensitivity of 1.34 nm/kGy was recorded for doses up to 0.5 kGy. Moreover, by combining experimental results with numerical simulations, it was found that changes occurred in the core refractive index of the irradiated optical fibers up to 2.5 ∙ 10 −5 . The increase of the core thermo-optic coefficient up to 1.5 ∙ 10 −8 /°C was observed as well.