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The paper presents the development and investigation of distributed and a quasi-distributed fiber optic sensors for the real-time monitoring of radiations during cancer treatments. Both sensors rely on ad-hoc developed nanoparticle-doped optical fibers with enhanced sensitivity to radiation. The distributed sensor is interrogated with an OFDR-based instrument and allows the reconstruction of the spatial dose distribution along the fiber. The quasi-distributed sensor is implemented through fiber Bragg gratings inscribed with a femtosecond laser in the few-mode section of a single mode-multi mode-single mode interferometer.
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Aurora Bellone, Massimo Olivero, Wilfried Blanc, Mourad Benabdesselam, Franck Mady, Alberto Vallan, Guido Perrone, "All-fiber sensors for radiation measurements in radiotherapy," Proc. SPIE 12372, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII, 123720D (6 March 2023); https://doi.org/10.1117/12.2651179