Abstract

Intense 2.7-Μm emissions are obtained from Er<sup>3+</sup>/Nd<sup>3+</sup> co-doped tellurite glass samples under the 808-nm laser diode excitation. According to the absorption spectra, Judd-Ofelt parameters and radiative transition probabilities are calculated and analyzed using the Judd-Ofelt theory. The spectroscopic properties and energy transfer mechanism between Er<sup>3+</sup> and Nd<sup>3+</sup> are analyzed. The effects of OH<sup>-</sup> content on the spectroscopic properties of Er<sup>3+</sup>/Nd<sup>3+</sup> co-doped samples are discussed. The obtained results indicate that Er<sup>3+</sup>/Nd<sup>3+</sup> co-doped tellurite glass can significantly develop optical properties of 2.7-Μm emission, if OH<sup>-</sup> groups can be effectively eliminated.

© 2012 Chinese Optics Letters

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