All-solid-state continuous-wave doubly resonant all-intracavity sum-frequency mixing blue laser at 488 nm

Abstract

Abstract:We report for the first time a coherent radiation at 488 nm by intracavity sum-frequency generation of 914 nm Nd:YVO 4 laser and 1047 nm Nd:YLF (Nd:YLiF 4 ) laser. Blue laser is obtained by using a doubly folded cavity, type-I critical phase matching LBO (LiB3O5) crystal sum-frequency mixing. With total pump power of 32.2 W (13.4 W pump power for 1047 nm Nd:YLF laser and 18.8 W pump power for 914 nm Nd:YVO 4 laser), TEM 00 mode blue laser at 488 nm of 1.23 W is obtained. The power stability in 30 min is better than 2.8%.Beam profile distribution of 488 nm blue laser

Two-mirror cavity graphic analysis in resonant cavity design

“…The propagation circle diagram analysis method [1][2][3][4] can simply and clearly reveal the change process of the optical mode in the cavity, and on the premise of satisfying some special optical transformation relations, it is more convenient and easy to analyze the optical model of the resonator. Cavity pump double wavelength narrow-linewidth laser resonator contains double thermal perturbation center [5][6][7][8][9] , especially when two pieces of gain medium in a pump beam waist and quasi three level laser beam waist near cavity, due to high energy density and the pump cavity of quasi three level laser is focused on the role, the two thermal lens effect will be more obvious.…”