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Proceedings Paper

Modeling and resolving calculation of thermal effect in face-pumped high power heat capacity disk laser
Author(s): Feng Huang; Yuefeng Wang; Wenwu Jia; Wei Dong
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Paper Abstract

The study of thermal effect plays an important role in the research and application of high power heat capacity laser. FEM has been used to seek the numerical solution of heat conduction equation in the past study of laser thermal effect, but the method can't describe the infection of laser material characteristic and pumping laser on the temperature distributing and thermal stress distributing. And it is difficult to analyze the thermal lens effect, thermal birefringence effect and their influences on the laser beam quality. The 3 dimensions heat conduction model under the cylindrical coordinate is set up on the base of pumped structure of face-pumped disk laser. And the precise solution of transient temperature field distribution is got through resolving the 3 dimensions heat conduction equation using integral-transform method. On the base of this, the thermal stress field transient distribution is worked out. Using a Φ50mm×18mm Nd:GGG disk laser as an example, the temperature distributing and thermal stress distributing under the heat capacity model is calculated. The result and the numerical solution using FEM are a good match, and the theory analyzing result is in accordance with the relative experiment result, so the thermal effect modeling and the resolving method are proved to be correct. The research establishes the base of the further theoretical analysis of thermal effect influence on the laser beam quality.

Paper Details

Date Published: 6 February 2008
PDF: 8 pages
Proc. SPIE 6823, High-Power Lasers and Applications IV, 682311 (6 February 2008); doi: 10.1117/12.755364
Show Author Affiliations
Feng Huang, Ordnance Engineering College (China)
Yuefeng Wang, Ordnance Engineering College (China)
Wenwu Jia, Ordnance Engineering College (China)
Wei Dong, Ordnance Engineering College (China)

Published in SPIE Proceedings Vol. 6823:
High-Power Lasers and Applications IV
Dianyuan Fan; Robert F. Walter, Editor(s)

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