Abstract

The optical properties of Er 3+ doped LiNbO 3 , LiNbO 3 (MgO) and LlNbO 3 (ZnO) have been studied. Polarized absorption and laser excited luminescence spectra at liquid-He temperature show different structure dependent on the co-dopants (MgO, ZnO). The relationship between the optical characteristics and the impurity sites location is discussed

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