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Proceedings Paper

Multiphonon transitions and heating effects in Er:YAG laser rods
Author(s): Serban Georgescu; Voicu Lupei
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Paper 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 4I15/2, up- conversion from 4I13/2, and cross-relaxation from 4S3/2) 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.

Paper Details

Date Published: 2 July 1998
PDF: 7 pages
Proc. SPIE 3405, ROMOPTO '97: Fifth Conference on Optics, (2 July 1998); doi: 10.1117/12.312816
Show Author Affiliations
Serban Georgescu, National Institute for Laser, Plasma, and Radiation Physics (Romania)
Voicu Lupei, National Institute for Laser, Plasma, and Radiation Physics (Romania)


Published in SPIE Proceedings Vol. 3405:
ROMOPTO '97: Fifth Conference on Optics
Valentin I. Vlad; Dan C. Dumitras, Editor(s)

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