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The thermal lensing effect in Nd:YAG laser rods at pumping by concentrated solar flux of Big Solar Furnace of the Scientific and Production Association "Physics-Sun"(Tashkent) is considered. For solving of the problem the computer model of the process was developed and the numerical experiments were performed.

Recently, fabrication of new laser materials with broadband absorption spectrum by ceramic technology allowed to receive the effective generation of coherent lights at lamp pumping. Due to this has appeared the new perspective opportunities for creation of high-efficient solar pumped lasers on the Nd 3+ :Cr 3+ :YAG ceramics. In this paper the possibility of application of the Nd 3+ : Cr 3+ :YAG ceramics for pumping by concentrated solar flux of the Big Solar Furnace with 1 MW power is considered.

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