589nm high power sum-frequency generation with quasi-continuous-wave diode-pumped Nd:YAG lasers

A 12.7 W 589 nm coherent light source with the linewidth of less than 1 GHz and the beam quality of M
²
= 1.2 is achieved by extra-cavity sum-frequency mixing 1064 nm and 1319 nm quasi-continuous-wave diode-pumped Nd:YAG lasers with a LBO crystal.