基于PPMgOLN的内腔倍频微片激光器  

Intracavity Frequency-Doubled Microchip Laser Based on PPMgOLN

作　　者：周煌[1] 邹小林[1] 梁万国[1] 梁桂荣[1] 陈怀熹[1] 董印锋[1] 

机构地区：[1]中国科学院福建物质结构研究所,福建福州350002

出　　处：《光学学报》2013年第F06期178-181,共4页Acta Optica Sinica

基　　金：福建省科技重大专项专题（2012HZ002）资助课题.

摘　　要：报道了一种采用周期性极化掺氧化镁铌酸锂（PPMgOI。N）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／Tim、Nd3＋掺杂摩尔分数为1．5％的Nd：YVO4晶体和通光长度为1mm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808nm激光二极管直接连续抽运，当抽运功率为1156mW时最高可获得295mw的532nm激光输出，光一光转换效率最高达25．5％，电一光转换效率达11．7％，平均光一光转换效率大于20％；2h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17mrad。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 I-ram-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 Gauss distribution with the divergence angle of 17 mrad, and meets the requirements of mobile laser display applications.

关 键 词：激光器 绿光激光器 周期性极化 掺氧化镁铌酸锂晶体 光胶合 

分 类 号：O436[机械工程—光学工程]