کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
732379 | 893244 | 2012 | 5 صفحه PDF | دانلود رایگان |

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×22 mm rectangular cross-section is used to both transmit and homogenize the concentrated solar radiation from the focal zone of a 2.88 m2 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.
► Record-high solar-pumped laser beam brightness figure of merit 0.29 is achieved.
► The figure of merit is 3 times higher than that of the most recent solar-pumped Nd:YAG laser by a Fresnel lens.
► Solar laser output beam stability is largely improved by using a fused silica light guide with rectangular section.
Journal: Optics & Laser Technology - Volume 44, Issue 7, October 2012, Pages 2115–2119