title: Sol-gel derived ionic copper-doped microstructured optical fiber: a potential selective ultraviolet radiation dosimeter.
abstract: We report the fabrication and characterization of a photonic crystal fiber (PCF) having a sol-gel core doped with ionic copper. Optical measurements demonstrate that the ionic copper is preserved in the silica glass all along the preparation steps up to fiber drawing. The photoluminescence results clearly show that such an ionic copper-doped fiber constitutes a potential candidate for UV-C (200-280 nm) radiation dosimetry. Indeed, the Cu⁺-related visible photoluminescence of the fiber shows a linear response to 244 nm light excitation measured for an irradiation power up to 2.7 mW at least on the Cu-doped PCF core. Moreover, this response was found to be fully reversible within the measurement accuracy of this study ( ± 1%), underlying the remarkable stability of copper in the Cu⁺ oxidation state within the pure silica core prepared by a sol-gel route. This reversibility offers possibilities for the achievement of reusable real-time optical fiber UV-C dosimeters.
authors: Laboratoire PhLAM/IRCICA, CNRS-Université Lille 1, F-59655 Villeneuve d'Ascq Cedex, France.
authors: Hicham
authors: H
authors: El Hamzaoui
authors: Youcef
authors: Y
authors: Ouerdane
authors: Laurent
authors: L
authors: Bigot
authors: Géraud
authors: G
authors: Bouwmans
authors: Bruno
authors: B
authors: Capoen
authors: Aziz
authors: A
authors: Boukenter
authors: Sylvain
authors: S
authors: Girard
authors: Mohamed
authors: M
authors: Bouazaoui