Improvement in solar-pumped Nd:YAG laser beam brightness

被引：58
作者：
Almeida, J. [1 ]
Liang, D. [1 ]
Guillot, E. [2 ]
机构：
[1] Univ Nova Lisboa, FCT, Dept Fis, CEFITEC, P-1200 Lisbon, Portugal
[2] PROMES CNRS, F-66120 Font Romeu, Odeillo, France
来源：
OPTICS AND LASER TECHNOLOGY | 2012年 / 44卷 / 07期
关键词：
Brightness; Light Guide; Nd:Yag; ND-YAG LASER;
D O I：
10.1016/j.optlastec.2012.03.017
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Solar-pumped solid-state lasers are promising for renewable extreme-temperature material processing. Here we report a large improvement in solar laser beam brightness by pumping a thin Nd:YAG single crystal rod. A fused silica light guide of 14 mm x 22 mm rectangular cross-section is used to both transmit and homogenize the concentrated solar radiation from the focal zone of a 2.88 m(2) parabolic mirror to the entrance aperture of a modified 2D-CPC flooded pump cavity, within which a 4 mm diameter rod is efficiently pumped. 2.2% slope efficiency is reached. Laser beam brightness figure of merit B is three times higher than that of the most recent solar-pumped Nd:YAG laser by a Fresnel lens. The introduction of the rectangular cross-section light guide has also ensured a much more stable laser emission than previous pumping schemes. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2115 / 2119
页数：5
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