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We report on a innovative Lab on Fiber (LOF) dosimeter for ionizing radiation monitoring at ultra-high doses. The new dosimeter consists in a metallo-dielectric resonator at sub-wavelength scale supporting localized surface plasmon resonances realized on the optical fiber (OF) tip. The resonating structure involves two gold gratings separated by a templated dielectric layer of poly(methyl methacrylate) (PMMA). Two LOF prototypes have been manufactured and exposed, at the IRRAD Proton Facility at CERN in Geneva, to 23 GeV protons for a total fluence of 0.67x1016 protons/cm2 , corresponding to an absorbed dose of 1.8 MGy. Experimental data demonstrate the "radiation resistance" feature of the LOF devices and a clear dependence of the reflected spectrum on the total dose, expressed by a cumulative blue-shift of ~1.4 nm of the resonance combined with a slight increase of 0.16 dBm in the reflected spectrum …
International Society for Optics and Photonics
Publication date: 
28 Aug 2019

Giuseppe Quero, Patrizio Vaiano Sr, Francesco Fienga Sr, Martino Giaquinto, Valentina Di Meo, Georgi Gorine, Pierluigi Casolaro, Luigi Campajola, Giovanni Breglio, Alessio Crescitelli, Emanuela Esposito, Armando Ricciardi, Antonello Cutolo, Federico Ravotti, Salvatore Buontempo, Marco Consales, Andrea Cusano

Biblio References: 
Volume: 11199 Pages: 111990I
Seventh European Workshop on Optical Fibre Sensors