Numéro
J. Phys. IV France
Volume 01, Numéro C7, Décembre 1991
2nd International Conference
Laser M2P
Page(s) C7-343 - C7-345
DOI http://dx.doi.org/10.1051/jp4:1991791
2nd International Conference
Laser M2P

J. Phys. IV France 01 (1991) C7-343-C7-345

DOI: 10.1051/jp4:1991791

ORIGIN OF THE INFRARED ABSORPTION IN LaMgAl11O19 : Ti3+ A POTENTIAL LASER MATERIAL

B. MARTINAT, A.M. LEJUS and D. VIVIEN

Chimie Appliquée de l'Etat Solide, URA 1466 ENSCP, 11 rue Pierre et Marie Curie, F-75231 Paris cedex 05, France


Abstract
The LaMgAl11O19 matrix (magnetoplumbite structure) activated with Ti3+ could present broadly tunable laser action between 650 and 1000 nm. The optical absorption measurements show, in addition to the 2T22E transition of Ti3+, two unexpected infrared bands. The first one, peaking at 730 nm, is attributed to an intervalence charge transfer transition of Ti3+ - Ti4+ pairs located in (4f) sites. The second one, at 960 nm, is attributed to a Ti2+ - Ti3+ charge transfer transition. These bands which occur in the range of the Ti3+ fluorescence wavelengths have to be suppressed for the lasing application of this material.



© EDP Sciences 1991