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Proceedings Paper

Energy Transfer Processes In YAG:Er And YAG:Nd
Author(s): I. Ursu; V. Lupei; A. M . Prokhorov; V. I. Zhekov
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Paper Abstract

The energy transfer processes in YAG:Er and YAG:Nd are discussed in connection with their effect on the kinetics of population of the levels involved in the laser emission. In YAG:Er the energy transfer processes de-excite the terminal laser level 4I3/2 and repump the initial laser level T 4-11p thus assuring a high efficiency of the three-micron emission at the Room Temperature in high concentrated crystals. A study of the departures from the exponential decay of luminescence of the pump level in in YAG:Er and of the metastable level 4F3/2 in YAG:Nd at activator concentrations up to 1.5 % show that these levels can transfer the excitation by cross-relaxation with identical activator ions and this transfer is of direct (static) donor-acceptor type. For YAG:Nd these processes limit severely the useful activator concentration.

Paper Details

Date Published: 18 May 1989
PDF: 7 pages
Proc. SPIE 1033, Trends in Quantum Electronics, (18 May 1989); doi: 10.1117/12.950614
Show Author Affiliations
I. Ursu, Central Institute of Physics (Romania)
V. Lupei, Central Institute of Physics (Romania)
A. M . Prokhorov, Central Institute of Physics (U.S.S.R.)
V. I. Zhekov, Central Institute of Physics (U.S.S.R.)


Published in SPIE Proceedings Vol. 1033:
Trends in Quantum Electronics
Ioan Ursu, Editor(s)

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