Systematic investigation of composition effects on the radiation-induced attenuation mechanisms of aluminosilicate, Yb-doped silicate, Yb- and Yb,Ce-doped aluminosilicate fiber preforms [Invited]

Abstract

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Systematic investigation of composition effects on the radiation-induced attenuation mechanisms ofaluminosilicate, Yb-doped silicate, Yb-and Yb,Ce-doped aluminosilicate fiber preforms [Invited] Systematic investigation of composition effects on the radiation-induced attenuation mechanisms of aluminosilicate, Yb-doped silicate, Yb-and Yb,Ce-doped aluminosilicate fiber preforms [Invited].Abstract: We present an original experimental approach to the investigation of radiation-induced attenuation (RIA) mechanisms in optical fiber preforms. This protocol combines thermally stimulated luminescence (TSL) measurements with the characterization of RIA annealing during TSL readouts. It is systematically applied to compositions of increasing complexity to resolve the specific role played by each dopant. Silicate, aluminosilicate, Yb-doped silicate, Yb-doped and Yb,Ce-codoped aluminosilicate preform samples are examined. Annealing processes are described in detail as a function of temperature throughout TSL readouts. The protocol reveals the temperature ranges at which trapped-carrier states forming intrinsic or dopant-related color centers are released, thus enabling the assessment of their activation energies. Metastable Ce 2+ ions are proved to be formed by electron trapping under irradiation. Along with the formation of Ce 3++ , they play a crucial role in the RIA mitigation.

Silica-based scintillators: basic properties of radioluminescence kinetics

“…The latter can be REs [12,13,15], copper [13,15], germanium [14,16,17], phosphorus [18] or nitrogen [19,20]. In silica, luminescent centers are most often reduced by electron capture under irradiation [23][24][25][26]. RCs then consist of electrons deeply trapped within the bandgap and their unique annealing route is recombination by free holes.…”

Radiation‐induced darkening and its suppression methods in Yb3+‐doped silica fiber core glasses

“…7,8 The RD effect in active fibers is the result of color center formation. [9][10][11][12][13] However, it is difficult to study the nature, precursor, and formation mechanism of color centers using optical fiber samples as the main research object. The main reasons for this are: (1) the absorption and photoluminescence (PL) signals of the color centers are primarily located in the ultraviolet-visible band.…”

“…The RD effect in active fibers is the result of color center formation 9–13 . However, it is difficult to study the nature, precursor, and formation mechanism of color centers using optical fiber samples as the main research object.…”

Investigation of the Incorporation of Cerium Ions in MCVD-Silica Glass Preforms for Remote Optical Fiber Radiation Dosimetry

“…For this particular application, the use of pure silica instead of multicomponent glasses presents a great advantage. Indeed, despite the fact that co-doping with Al or P stabilizes the Ce 3+ ions inside doped silica glasses [ 17 , 21 ], the presence of such elements is suspected to provoke defect formation under ionizing radiations [ 22 , 23 ]. The optical absorption of these defects could degrade the Ce 3+ scintillation efficiency in the visible domain.…”