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Proceedings Paper

The effect of the thermal lens in optically pumped laser rods operated in heat capacity mode
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Paper Abstract

Solid-state heat-capacity laser (SSHCL) has been developed in recent years. One of the key features of this heat capacity approach is the inversion of the temperature profile through the medium as compared to conditions where the laser is actively cooled while lasing takes place. So the thermal effects in the active medium on the two conditions mentioned above must be different. In this paper, we mostly discuss the contribution of temperature gradients to the effect of the thermal lens in optically pumped cylindrical laser rods operated in heat capacity operation through classical thermal conductivity equation, end effects and birefringence of the material with stress from temperature gradients ignored. Expressions are derived for the focus length of thermal lensing in laser rods for single-shot and repetitively pulsed operations. Programming the computer, we respectively calculate the thermal induced refractive power of the laser rods in the heat capacity operation and on the cooling condition, and compare the double results.

Paper Details

Date Published: 26 January 2005
PDF: 8 pages
Proc. SPIE 5627, High-Power Lasers and Applications III, (26 January 2005); doi: 10.1117/12.570321
Show Author Affiliations
Yi Yang, National Univ. of Defense Technology (China)
XiaoJun Xu, National Univ. of Defense Technology (China)
Baihong Shu, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 5627:
High-Power Lasers and Applications III
Dianyuan Fan; Ken-ichi Ueda; Jongmin Lee, Editor(s)

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