J. Phys. IV France 04 (1994) C4-389-C4-392
Site-selective spectroscopy of Nd3+ in the Ca3Ga2Ge3O12 laser crystalU. CALDIÑO1, L.E. BAUSÁ2, J. GARCÍA SOLÉ2, F. JAQUE2, A.A. KAMINSKII3, A.V. BUTASHIN3 and B.V. MILL3
1 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
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