High beam quality 400W practical all-solid-state laser for laser beam texture

A high-average-power and high-beam-quality diode-side-pumped solid-state laser was designed carefully for laser beam texture. By using of low concentration Nd:YAG crystals with thermally near-unstable resonator design and two-rod birefringence compensation technology, the 1064 nm cw output power of 400 W at pump power of 1170 W was achieved with the beam quality factor M 2 ~ 15, corresponding to an optical-to-optical conversion efficiency of 34.2%.