2nd International Conference
Laser M2P

J. Phys. IV France 01 (1991) C7-403-C7-406
DOI: 10.1051/jp4:19917103

SITE SELECTIVE SPECTROSCOPY OF Nd³⁺ AND Cr³⁺ SITES IN LiNbO₃ CRYSTALS CODOPED WITH Mg²⁺ IONS

J. GARCÍA SOLÉ^{1, 2}, A. MONTEIL¹, G . BOULON¹, E. CAMARILLO^{3, 4}, J.O. TOCHO^{3, 5}, I. VERGARA³ and F. JAQUE<sup>3

1</sup>  U.A. C.N.R.S. 442, Université Claude Bernard, Lyon I, F-69622 Villeurbanne, France
²  Departamento de Física Aplicada C-IV, Universidad Autónoma de Madrid, Cantoblanco, SP-28049 Madrid, Spain
³  Dpto. Física Aplicada C-IV, Universidad Autónoma de Madrid, Cantoblanco, SP-28049 Madrid, Spain
⁴  Universidad Nacional Autónoma de Mexico, Instituto de Física, P.O . 20364, 01000 México D.F.
⁵  Centro de Investigaciones Opticas y Departamento de Física, La Plata, Argentina

Abstract
The fluorescence properties of Nd³⁺ in Nd : MgO : LiNbO₃ and Cr³⁺ in Cr : MgO : LiNbO₃ systems have been systematically studied after site selective laser excitation. Three kinds of sites have been detected for the active (Nd³⁺ or Cr³⁺) ions. Two sites correspond to the active ion located in Li⁺ and Nb⁵⁺ lattice positions, and also appear in the singly (without MgO) doped systems. Codoping with Mg²⁺ ions induce the appearance of a new site for the active ion, together with a decreasing in the Li/Nb occupation ratio.

© EDP Sciences 1991