14-MeV Neutron, $\gamma$-Ray, and Pulsed X-Ray Radiation-Induced Effects on Multimode Silica-Based Optical Fibers

Feasibility of radiation dosimetry with phosphorus-doped optical fibers in the ultraviolet and visible domain

“…We previously compared the effects of these various irradiations (neutrons, X-rays, and gamma-rays) on P-doped fibers and showed that all irradiations lead to the generation of the same RICCs and with comparable concentrations [13]. As a consequence, we focus our study on 10 keV X-ray tests that are representative of other irradiation types for this class of optical fibers.…”

Integration of Optical Fibers in Megajoule Class Laser Environments: Advantages and Limitations

“…Our testing reveals no dependence of the RIA on the Ge concentrations levels and limited differences between fibers from different manufacturers. We previously showed that the transient responses of this fiber class cannot be only explained by the same defects than the ones observed under steady state irradiations [9]. Unstable defects also contribute to the RIA spectra measured at times shorter than one second.…”

“…We compare the radiation effects induced by this irradiation type to the ones associated to a Co60 source or a 14 MeV steady state neutron irradiation. These studies showed that the three irradiation types lead to the same permanent point defects when equivalent doses are considered [9].…”

“…All the optical fibers located inside the LMJ experimental hall (EH) will have to resist to the radiative environment associated with the FIC experiments [9]. Fig.…”

Radiation effects of 14MeV neutrons on germanosilicate and phosphorus-doped multimode optical fibers

“…Several authors showed that the absorption bands related to GeX (2.61 eV, 475 nm), Ge(1) (4.41 eV, 280 nm) and Ge-NBOHC (1.97 eV, 630 nm) can be used to correctly fit the RIA spectral curve after c-rays [6,7]. We recently showed [8] that these three defects also allow to correctly fit the c-ray and 14 MeV neutron RIA curves of our Ge-MMF fiber.…”