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Acta of Turin Polytechnic University in Tashkent

Abstract

The new type of high efficiency solar pumped laser based on the active element of Nd:Cr:GSGG in the form of a thin slab with side pumping by concentrated solar radiation at the focus of parabolic concentrator with a diameter of 1 m2 is studied by computer simulation method. The solar pumped laser (SPL) is a device that converts the solar radiation energy into the laser light energy. The SPLs use different active mediums that absorb the solar light and transform it into the laser light. The main problem of SPLs today is low efficiency. The maximal efficiency achieved is 30W/m2 which is less than 5 % with the use of Nd: YAG (Neodymium doped Yttrium Aluminum Garnet, chemical formula - Nd:Y3Al5O12). Therefore in this work we propose to use active element of Nd:Cr: GSGG (Neodymium and Chromium codoped Gallium Scandium Gadolinium Garnet ) to increase the efficiency.

First Page

34

Last Page

37

References

[1]. Sh. Payziyev, Kh. Makhmudov, “New approach in solar-to-laser power conversion”, Journal of Renewable and Sustainable Energy, 8, 015902 , 2016 [2]. Sh. Payziyev, Kh. Makhmudov. “Enhancing of solar pumped Nd:YAG laser efficiency using Cr:LiCAF frequency down-shifter”, Optics Communications, 380, 57-60, 2016 [3]. Liang, Dawei, Joana Almeida, Cláudia R. Vistas, and Emmanuel Guillot. "Solar-pumped Nd: YAG laser with 31.5 W/m2 multimode and 7.9 W/m2 TEM00-mode collection efficiencies", Solar Energy Materials and Solar Cells, Vol. 159, pp. 435-439, 2017

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