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Proceedings Paper

Interactions governing the stationary 3-um laser emission of Er-doped crystals
Author(s): Voicu Lupei; Serban Georgescu; Aurelia Lupei; Ioan Ursu; Mihai P. Dinca
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Paper Abstract

The characteristics of energy processes in concentrated Er3+ system and their effects on the stationary three micron laser emission are discussed. It is shown that in certain conditions, valid for a broad range of concentrations, the laser equations could be solved analytically, the solution allowing to study the influence of various parameters on the laser emission. This revealed that a crucial role in determining a positive pump effect is played by a figure of merit that depends on the ratios of up-conversion rates from 4I11/2 and 4I13/2 levels and of the fractional thermal populations for the crystal field components involved in emission. In given pump conditions, the restrictions imposed on the figure of merit limit the emission wavelength range and the efficiency. The emission in Er3+ systems co-doped with Cr3+ is also discussed. Cr3+ co- doping not only improves the pump efficiency, but modifies the whole chain of energy transfer processes, leading to the extension of the laser wavelength range.

Paper Details

Date Published: 17 June 1993
PDF: 11 pages
Proc. SPIE 1864, Solid State Lasers IV, (17 June 1993); doi: 10.1117/12.146885
Show Author Affiliations
Voicu Lupei, Institute of Atomic Physics (Romania)
Serban Georgescu, Institute of Atomic Physics (Romania)
Aurelia Lupei, Institute of Atomic Physics (Romania)
Ioan Ursu, Institute of Atomic Physics (Romania)
Mihai P. Dinca, Univ. of Bucharest (Romania)


Published in SPIE Proceedings Vol. 1864:
Solid State Lasers IV
Gregory J. Quarles; Milton A. Woodall, Editor(s)

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