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Title

Effect of UV-laser irradiation on the structure and photoluminescence response of Er3+-doped fluorotellurite film glasses produced by pulsed laser deposition

AuthorsMariscal, A. ; Albarrán, C. G.; Morea, Roberta ; Serna, Rosalía ; Balda, Rolindes ; Gonzalo, J.
Issue Date4-Sep-2017
Citation14th International Conference on Laser Ablation (2017)
AbstractFluorotellurite glasses combine the good mechanical, thermal, and chemical properties of oxide glasses with the low phonon energy characteristic of fluoride crystals, which makes them attractive hosts for rare-earth (RE) ions, such as Er3+. In addition, photoluminescence (PL) emission efficiency of RE-doped fluorotellurite glasses can be improved through the nucleation of a glass-ceramics phase, which provides to the RE-ions with a local fluoride crystalline environment that is immersed in an oxide glass matrix. Yet, practical application of these materials for the development of all-optical networks requires at the present time good quality Er-doped thin films that allow the design and fabrication of robust, low-cost, miniature waveguide amplifiers (EDWAs) based on the 4I13/2¿4I15/2 emission transition of Er3+ at 1.5 ¿m. We have successfully produced transparent Er-doped TeO2-ZnO-ZnF2 thin film glasses by pulsed laser deposition at room temperature [2]. Their structure was similar to that of the parent bulk glasses; however they showed a low Er-related emission and post-deposition thermal treatments are necessary to activate their PL emission. In this work we investigate the enhancement of the PL emission of the Er ions by excimer pulsed laser annealing treatment. Laser annealing offers the potential to induce local nanocrystallization in the films [3], thus providing an improved host environment for the Er ions. The effect of laser energy density and annealing duration are considered and the results of the laser annealing will be compared with those obtained from alternative conventional thermal treatments of the films, such as in-situ during growth or post-deposition annealing. The efficiency for the improvement of the film structural properties and the reduction of OH- concentration will be discussed.
DescriptionResumen del póster presentado a la 14th International Conference on Laser Ablation (COLA), celebrada en Marseille (France) del 3 al 8 de septiembre de 2017.
URIhttp://hdl.handle.net/10261/167821
Appears in Collections:(CFMAC-IO) Comunicaciones congresos
(CFM) Comunicaciones congresos
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