Due to inhomogeneous spatial distribution and large divergence angle of the laser diode array(LDA),LDA is inconvenient for end-pumping solid-state lasers,and the output beam reshaping and coupling is required.A coupling system for end-pumping solid-state lasers is designed with Zemax.The system is composed of a fast axis collimating lens and a lens duct.The relationship between the coupling efficiency and the characteristic parameters of the lens duct is studied.The optimal coupling system parameters are ob...