Courrol, Lilia C.Messaddeq, Younes [UNESP]Messaddeq, Sandra H.Ribeiro, Sidney José Lima [UNESP]Samad, Ricardo E.de Freitas, Anderson Z.Vieira, Nilson D.2014-05-202014-05-202008-01-01Journal of Physics and Chemistry of Solids. Oxford: Pergamon-Elsevier B.V. Ltd, v. 69, n. 1, p. 55-59, 2008.0022-3697http://hdl.handle.net/11449/26122In this work we have studied pure and thulium- and chromium-doped ZBLAN glasses irradiated by ultra-short laser pulses. A Ti:sapphire CPA system was used, producing a 500 Hz train of pulses, centered at 830 nm, with 375 mu J of energy and 50 fs of duration (FWHM). The beam was focused by a 20 Him lens, producing a converging beam with a waist of 12 pin. The absorption spectra before and after laser irradiation were obtained showing production of color centers in pure, thulium-doped and chromium-doped ZBLAN glasses. A damage threshold of 9.56 TW/cm(2) was determined for ZBLAN. (C) 2007 Elsevier Ltd. All rights reserved.55-59engglassescolour centresoptical propertiesradiation damageArtigo10.1016/j.jpcs.2007.07.125WOS:000253181000009Acesso restrito299850384191781564460474630346540000-0003-3286-9440