Multiphonon transitions and heating effects in Er:YAG laser rods

Serban Georgescu; Voicu Lupei

doi:10.1117/12.312816

2 July 1998 Multiphonon transitions and heating effects in Er:YAG laser rods

Serban Georgescu, Voicu Lupei

Proceedings Volume 3405, ROMOPTO '97: Fifth Conference on Optics; (1998) https://doi.org/10.1117/12.312816
Event: ROMOPTO '97: Fifth Conference on Optics, 1997, Bucharest, Romania

Abstract

In this paper we discuss the heat produced by the non-radiative (multiphonon) transitions in Er:YAG laser rods, during the optical pumping, using the mathematical modeling. Three energy transfer processes (up-conversion from ⁴I_15/2, up- conversion from ⁴I_13/2, and cross-relaxation from ⁴S_3/2) are included in the rate equations. The main result of our simulation is that for usual optical pump conditions (Xenon flash-lamp, pumping pulse duration 200 - 300 microsecond(s) ) more than 50% of the absorbed energy is lost as heat in the active medium and only a small fraction (approximately 1%) is lost as fluorescent emission.

Citation Download Citation

Serban Georgescu and Voicu Lupei "Multiphonon transitions and heating effects in Er:YAG laser rods", Proc. SPIE 3405, ROMOPTO '97: Fifth Conference on Optics, (2 July 1998); https://doi.org/10.1117/12.312816

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