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Proceedings Paper

Analyses of mode filling factor of a laser end-pumped by a LD with high-order transverse modes
Author(s): Juhong Han; You Wang; Guofei An; Kepeng Rong; Hang Yu; Shunyan Wang; Wei Zhang; He Cai; Liangping Xue; Hongyuan Wang; Jie Zhou
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Paper Abstract

Although the concept of the mode filling factor (also named as “mode-matching efficiency”) has been well discussed decades before, the concept of so-called overlap coefficient is often confused by the laser technicians because there are several different formulae for various engineering purposes. Furthermore, the LD-pumped configurations have become the mainstream of solid-state lasers since their compact size, high optical-to-optical efficiency, low heat generation, etc. As the beam quality of LDs are usually very unsatisfactory, it is necessary to investigate how the mode filling factor of a laser system is affected by a high-powered LD pump source. In this paper, theoretical analyses of an end-pumped laser are carried out based on the normalized overlap coefficient formalism. The study provides a convenient tool to describe the intrinsically complex issue of mode interaction corresponding to a laser and an end-pumped source. The mode filling factor has been studied for many cases in which the pump mode and the laser mode have been considered together in the calculation based on analyses of the rate equations. The results should be applied for analyses of any other types of lasers with the similar optical geometry.

Paper Details

Date Published: 12 May 2017
PDF: 6 pages
Proc. SPIE 10173, Fourth International Symposium on Laser Interaction with Matter, 101731I (12 May 2017); doi: 10.1117/12.2268121
Show Author Affiliations
Juhong Han, Southwest Institute of Technical Physics (China)
You Wang, Southwest Institute of Technical Physics (China)
Guofei An, Southwest Institute of Technical Physics (China)
Kepeng Rong, Southwest Institute of Technical Physics (China)
Hang Yu, Southwest Institute of Technical Physics (China)
Shunyan Wang, Southwest Institute of Technical Physics (China)
Wei Zhang, Southwest Institute of Technical Physics (China)
He Cai, Southwest Institute of Technical Physics (China)
Liangping Xue, Southwest Institute of Technical Physics (China)
Hongyuan Wang, Southwest Institute of Technical Physics (China)
Jie Zhou, Southwest Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 10173:
Fourth International Symposium on Laser Interaction with Matter
Yongkun Ding; Guobin Feng; Dieter H. H. Hoffmann; Jianlin Cao; Yongfeng Lu, Editor(s)

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