Study of Radiation Effects on Er3+-Doped Nanoparticles Germano-Silica Fibers

Abstract

International audienceThe main goal of the present work is to study the impact of Er–SiO2 and Er–Al2O3 nanoparticles on the radiationinduced defects in germano-silica optical fibers with Al/Ge ranges over 0.1–150. These fibers are prepared by a modified chemical vapor deposition technique and are characterized by optical absorption and electron paramagnetic resonance spectroscopy. High amount of Ge, Er–SiO2 nanoparticles-derived optical fibers exhibit lower radiation induced attenuation than those with a low Ge content undoped or doped with Al2O3 nanoparticles. Furthermore, the behavior of point defects namely GeE’, Ge(1), SiE’, nonbridging oxygen hole centers, and H(1) is reported according to the Al/Geratio. In contrast to the optical fiber preforms, no Al-related defects are found in the optical fibers. Therefore, the results evidence thestrong radiation tolerance by the virtue of the nanoparticle doping, which is enabling technology for the development of the photonic and space applications in the radiation fields

Structural and Optical Modifications in the BaO-ZnO-LiF-B2O3-Yb2O3 Glass System after γ-Irradiation

“…Irradiation can modify the glass optical properties by the presence of new absorption bands in the spectrum [8]. The optical absorption and emission of the glass after irradiation give an idea of the extent of photo-darkening in the ultraviolet (UV), visible (Vis), and infrared (IR) regions [18]. Based on this, the radiation hardness of the glass can be reckoned for the development of optical fiber, and photonic systems in an environment like space [18].…”

“…The optical absorption and emission of the glass after irradiation give an idea of the extent of photo-darkening in the ultraviolet (UV), visible (Vis), and infrared (IR) regions [18]. Based on this, the radiation hardness of the glass can be reckoned for the development of optical fiber, and photonic systems in an environment like space [18]. From the optical absorption spectroscopy, the absorption edge helps study the band structure, optically induced transitions, and optical bandgap [6].…”