The experimental results of LD pumped monolithic non-planar ring resonator (NPRO) single frequency Nd:YAG laser and LD pumped monolithic bonded crystal NPRO TmYAG laser are proposed. 1064 nm and 1319 nm single frequency lasers with the power up to 1.876 W and 616 mW were obtained from the LD pumped NPRO Nd:YAG lasers, and the optical-optical efficiencies were 53.4% and 19.2%, respectively. The 878 mW single frequency 2 μm laser was generated in the LD pumped monolithic NPRO TmYAG laser, with the optical-optical efficiency of 18.8%. For reducing the influence of heat effect in 2 μm laser, a novel double-bonded YAG+TmYAG+YAG crystal was designed and good results were obtained.