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Proceedings Paper

Theoretical and experimental investigation of thermal effect in end-pumped Tm,Ho:YLF lasers
Author(s): Xinlu Zhang; Li Li; Jinhui Cui
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Paper Abstract

Thermal lensing in an end-pumped Tm,Ho:YLF laser crystal has been investigated with a theoretical model of continuous-wave (CW) quasi-three-level laser. Under considering energy transfer up-conversion (ETU) and ground state re-absorption (GSA), the rate equations are given. The influence of ETU on fractional thermal loading is calculated, and the results show that fractional thermal loading critically depends on the pump-to-mode size ratio. The temperature distributions of a Tm,Ho:YLF crystal under different pump powers have been analyzed. The output power and the focal length of the thermal lens as a function of pump power are obtained in experiment. The experimental results are compared with theoretical results, and the experimental results show that the theoretical results are reasonable.

Paper Details

Date Published: 6 February 2008
PDF: 10 pages
Proc. SPIE 6823, High-Power Lasers and Applications IV, 682305 (6 February 2008); doi: 10.1117/12.753394
Show Author Affiliations
Xinlu Zhang, Harbin Engineering Univ. (China)
Li Li, Harbin Engineering Univ. (China)
Jinhui Cui, Harbin Engineering Univ. (China)

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

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