报道了一种采用周期性极化掺氧化镁铌酸锂（PPMgOLN）晶体作为倍频晶体的高紧凑型微片绿光激光器。将通光长度为1.5 mm、Nd3+掺杂摩尔分数为1.5%的Nd:YVO4晶体和通光长度为1 mm的PPMgOLN晶体光胶合在一起，端面镀相应的增透/高反膜之后构成紧凑的激光谐振腔。采用光胶合晶体作为单片激光腔，可以实现在高紧凑的体积内获得较高的输出功率。采用单管808 nm激光二极管直接连续抽运，当抽运功率为1156 mW时最高可获得295 mW的532 nm激光输出，光光转换效率最高达25.5%，电光转换效率达11.7%，平均光光转换效率大于20%；2 h内功率稳定度约为2.5%。激光输出光斑呈良好的高斯分布，光束发散角约为17 mrad。

A high compact microchip green laser is demonstrated with periodically poled MgO-doped lithium niobate (PPMgOLN) as frequency doubler. A 1.5-mm long 1.5% (mole fraction) Nd3+-doped Nd:YVO4 is in optical contact with a 1-mm-long PPMgOLN crystal. The end surfaces are coated with corresponding anti-reflection/high-reflection films, composing a highly compact laser resonant cavity. A single 808 nm laser diode is used as pumping source. A 295 mW 532 nm green laser with intracavity frequency doubling is obtained at the pumping power of 1156 mW in continuous wave operation, which has an optical-to-optical efficiency of 25.5% and electronic-to-optical efficiency of 11.7%. The average optical-to-optical efficiency is more than 20%. The output power stability is about 2.5% in 2 h. The output spot takes on a Gauss distribution with the divergence angle of 17 mrad, and meets the requirements of mobile laser display applications.