6.2 W外腔和频589 nm黄光激光器

 报道了一台800 Hz，6.2 W外腔和频的589 nm黄光激光器。基频激光器均采用双棒串接平平对称腔，增益介质为Nd：YAG晶体，采用声光调Q方式分别获得11.1 W的1 064 nm激光和12.6 W的1 319 nm激光。和频晶体采用三硼酸锂（LBO），尺寸为4 mm×4 mm×30 mm，采用Ⅰ类非临界相位匹配。将两束激光通过分光镜合束，聚集后注入LBO晶体，获得589 nm黄光最大输出功率为6.2 W，脉宽为50 ns，和频效率26.2%。x方向和y方向的光束质量平方因子分别为3.20和3.61。

6.2 W 589 nm yellow laser by extra-cavity sum-frequency

A 6.2 W 589 nm yellow laser at a repetition rate of 800 Hz was reported. Double rod and symmetry plane-plane cavity was adopted. The gain medium was Nd:YAG, 11.1 W 1 064 nm and 12.6 W 1 319 nm was obtained by acousto-optic (AO) Q-switched. The sum-frequency medium was a 4 mm×4 mm×30 mm lithium triborate (LBO) crystal with type Ⅰ critical phase match. Two beams were combinated with beam splitter and focused into the LBO crystal. A maximum power 6.2 W of the 589 nm laser was obtained, laser pulse width was 50 ns. The sum-frequency efficiency was 26.2%. The beam quality factor was 3.20 and 3.61 respectively in parallel and perpendicular direction．