3rd International Conference Laser M2P

J. Phys. IV France 04 (1994) C4-385-C4-388
DOI: 10.1051/jp4:1994492

Cr³⁺, Nd³⁺ multisites, pairs and energy transfer processes in laser crystal YAlO₃

J.A. MARES¹, G. BOULON², A. BRENIER², L. LOU^{2, 3}, S.R. ROTMAN⁴ and H. LURIA<sup>4

1</sup>  Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Praha 6, Czech Republic
²  LPCML, URA 442 du CNRS, Université Lyon I, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne cedex, France
³  University of Science and Technology of China, 230026 Hefei, Anhui, The People's Republic of China
⁴  Ben Gurion University of the Negev, Department of Electrical and Computer Engineering, 84105 Beer-Sheva, Israel

Abstract
Detailed spectroscopic studies of YAlO₃:Nd, YAlO₃:Cr and YAlO₃:Nd, Cr have shown that these crystals contain up to eight Nd³⁺ multisites and three Cr³⁺ ones. [MATH] energy transfer is observed between various multisites and is starting from ²E Cr³⁺ energy level. Cr³⁺ donor decay can be adequately fit with the standard Inokuti-Hirayama theory but an assumption of a spatial correlation between Cr³⁺ donors and Nd³⁺ acceptors does a much better fit of Nd³⁺ fluorescence decay.

© EDP Sciences 1994