GUTTILLA , Angela

This thesis is part of the CERTYF research project, acronym of Combined Effects of Radiation Temperature and hYdrogen in optical Fibers. The CERTYF project aims to improve knowledge on the degradation processes of silica-based material and optical fibers used in severe or harsh environments combining irradiation constraints, hydrogen and...

The radiation-induced attenuation in silica optical fibers is usually attributed to the formation of color centers. The RIA spectrum is then considered a composition of several characteristic optical absorption bands. We argue, based on experimental and theoretical facts, that the photoionization of radiation-induced bandgap states may also...

International audience

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...

International audience

Online X‐ray radiation induced attenuation (RIA) has been performed in aluminosilicate optical fibers having different Al concentrations. The studied UV‐visible spectral range revealed the presence of absorption bands related to Al defects. Their generation is shown to be not noticeably dependent on the dose rate. Furthermore, the Al content...

International audience

International audience

International audience

International audience

International audience

International audience

International audience

International audience

International audience

International audience

International audience

International audience

International audience