J. Phys. IV France 04 (1994) C4-573-C4-577
Spectroscopy, modelling and laser operation of holmium doped laser crystalsY. KALISKY1, 2, S.R. ROTMAN3, G. BOULON4, C. PEDRINI4 and A. BRENIER4
1 Laser Department, Nuclear Research Centre-Negev, P.O. Box 9001, Beer-Sheva 84190, Israel
2 Innovative Lasers Corp., 3280 South Hemisphere Loop, Suite 120, Tucson, AZ 85706, U.S.A.
3 Ben Gurion University of the Negev, Department of Electrical and Computer Engineering, Beer-Sheva 84105, Israel
4 Laboratoire de Physico-Chimie des Matériaux Luminescents, Université Lyon I, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne cedex, France
Spectroscopic studies using laser induced fluorescence and numerical modelling of energy transfer and back transfer mechanism are reported in Er:Tm:Ho:YLF, Cr:Tm:Ho:YAG and Cr:Tm:YAG laser crystals at various temperatures (10 K-300 K). Direct energy transfer from Tm3+ excited states to Ho3+ 5I7 emitting level was observed and analyzed both in YAG and YLF. Further analysis of Cr3+ and Tm3+ time dependent emission curves indicate strong correlation of chromium-thulium pairs. Pulsed operation of holmium laser at high temperature will be presented.
© EDP Sciences 1994