3rd International Conference Laser M2P

J. Phys. IV France 04 (1994) C4-389-C4-392
DOI: 10.1051/jp4:1994493

Site-selective spectroscopy of Nd³⁺ in the Ca₃Ga₂Ge₃O₁₂ laser crystal

U. CALDIÑO¹, L.E. BAUSÁ², J. GARCÍA SOLɲ, F. JAQUE², A.A. KAMINSKII³, A.V. BUTASHIN³ and B.V. MILL<sup>3

1</sup>  Depto. de Física, Universidad Autónoma Metropolitana, Iztapalapa, P.O. Box 55-534, 09340 México, D.F. México
²  Departamento de Física de Materiales C-IV, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
³  Institute of Crystallography, Academy of Sciences of Russia, Leninskii Pr. 59, 117333 Moscow, Russia

Abstract
Laser excited site-selection spectroscopy of Nd³⁺ ion in the Ca₃Ga₂Ge₃O₁₂ laser garnet crystal has been investigated for the transitions [MATH] and [MATH] in order to understand the nature of the different Nd centers in terms of the possible charge compensating defects. Lifetime data of the [MATH] transition obtained as a function of Nd concentration have allowed to distinguish the Nd³⁺ ions compensated by Ga³⁺ ions (Nd³⁺ (Ca²⁺)-Ga³⁺ (Ge⁴⁺)) from other kind of Nd³⁺ ions, which can be presumably associated with Nd³⁺ (Ca²⁺)-Nd³⁺ (Ge⁴⁺) pairs.

© EDP Sciences 1994