LD-pumped Nd:YAG 946 nm/1 064 nm laser dual-wavelength operation and intracavity sum-frequency mixing

An LD-pumped Nd:YAG laser that generates simultaneous laser action at the wavelengths 1 064 nm and 946 nm by optimizing film design is presented. An optimized CW 593.5 nm yellow laser at room temperature was obtained for the first time. Using type-I critical phase-matching LBO crystal, 500.8 nm laser was obtained by 1 064 nm and 946 nm intracavity sum-frequency mixing for the first time. The maximum laser output power of 20 mW was obtained when an incident pump laser of 1 4 W was used. The optical-to-optical conversion was up to 1.4% and the power instability in 24 h was better than ±3%.