LD end-pumped intracavity frequency-doubling solid-state blue laser is systematically studied. Based on the quasi-three-level equations, the formulas for pump power threshold,optimal length of laser crystal and slope efficiency are deduced, influencing factors with respect to them are discussed. Nonlinear optical coupled wave equation and the principle of SHG are studied. By using the ABCD transmission matrix and "g" parameter, an optimum linear laser resonate is designed. Temperature distribution and thermal focus of laser crystal are calculated by means of numerical analysis. In the experiment, comparing four kinds of double crystals, LBO crystal is the best choice. Using the thermo-electric cooler and thermal conductivity to control the temperature of LD and laser material, 105mW 473nm blue laser is obtained and the optical conversion efficiency was 5.7% for 2W pump power. |