4 April 2005 Optical and spectroscopic properties of erbium-activated modified silica glass with 1.54 μm high quantum efficiency
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Abstract
Several modified silicate glass samples activated with erbium ions at two different doping rates, namely 0.2 and 0.5 mol%, exhibit at room temperature a fine-structured emission band around 1.5 mm. The decay of luminescence from the Er3+ 4I13/2 metastable level is found to evolve according to a single-exponential law and a lifetime as long as 14.2 ms is measured from the glass with the lower erbium concentration. An estimation of the corresponding radiative lifetime, τrad, is achieved on the basis of various theoretical models. Internal gain curves resulting from absorption and stimulated emission cross sections are also shown. A 75% quantum efficiency is deduced for the less Er3+ concentrated glass, which is nearly the highest one obtained from silica based doped-glasses.
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Vincent Benoit, Shivakiran Narasimha Bantwal Bhaktha, Brigitte Boulard, Stephane Chaussedent, Andrea Chiappini, Alessandro Chiasera, Eugene Duval, Serge Etienne, Maurizio Ferrari, Bruno Gaillard-Allemand, Yoann Jestin, Maurizio Mattarelli, Maurizio Montagna, Andre Monteil, Enrico Moser, Gualtiero Nunzi Conti, Stefano Pelli, Herve Portales, Desai Narayana Rao, Giancarlo C. Righini, Krishna Chaitanya Vishunubhatla, "Optical and spectroscopic properties of erbium-activated modified silica glass with 1.54 μm high quantum efficiency", Proc. SPIE 5723, Optical Components and Materials II, (4 April 2005); doi: 10.1117/12.590252; https://doi.org/10.1117/12.590252
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