Interactions governing the stationary 3-um laser emission of Er-doped crystals

Voicu Lupei; Serban Georgescu; Aurelia Lupei; Ioan Ursu; Mihai P. Dinca

doi:10.1117/12.146885

17 June 1993 Interactions governing the stationary 3-um laser emission of Er-doped crystals

Voicu Lupei, Serban Georgescu, Aurelia Lupei, Ioan Ursu, Mihai P. Dinca

Proceedings Volume 1864, Solid State Lasers IV; (1993) https://doi.org/10.1117/12.146885
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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 ⁴I_11/2 and ⁴I_13/2 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.

Citation Download Citation

Voicu Lupei, Serban Georgescu, Aurelia Lupei, Ioan Ursu, and Mihai P. Dinca "Interactions governing the stationary 3-um laser emission of Er-doped crystals", Proc. SPIE 1864, Solid State Lasers IV, (17 June 1993); https://doi.org/10.1117/12.146885

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