Abstract: A direct conversion of concentrated solar radiation into a coherent laser beam can be used to improve the conversion efficiency because of the design simplicity on structure. To surpass the lasing threshold，the solar radiation needs to be highly concentrated. The high efficient concentration system is composed by the Fresnel lens and the cone-channel condenser. The solar concentrated by the concentrator system is coupled into the chamber pumping Nd ∶ YAG laser media. The concentrator ratio is 104，improving the output of laser.

Key words: lasers, solar, Fresnel lens, cone-channel condenser