输出功率达230W的绿光固体激光器  

Green solid-state laser with 230 W output power

作　　者：苑利钢[1] 姜东升[1] 王建军[1] 赵鸿[1] 赵书云[1] 张驰[1] 邹跃[1] 杨涛[1] 梁兴波[1] 

机构地区：[1]华北光电技术研究所固体激光技术国家重点实验室,北京100015

出　　处：《红外与激光工程》2008年第6期980-983,共4页Infrared and Laser Engineering

基　　金：国防科技重点实验室基金项目(51438060304ZS0803)

摘　　要：介绍了一种高功率Nd:YAG绿光激光器实验装置,采用非垂直入射式漫反聚光腔,解决了高泵浦功率密度下增益分布均匀性问题,采用双泵浦头串联的对称直通谐振腔结构,在LD泵浦功率1400W时,获得了400W基频输出,采用Ⅰ类温度匹配方式LBO晶体内腔倍频,在声光Q开关重复频率10kHz条件下,获得了平均功率达230W的532nm绿光激光输出,脉冲宽度小于56ns,光-光转换效率16.8%,光束质量约30mm·mrad。该激光器结构简单,可靠性好,适合于工程应用。A high-power, green Nd：YAG laser setup was introduced. By use of the non- perpendicular incidence pumping structure together with a monolithic diffusive reflective cavity in the laser head, the uniform distribution of excited Nd ions was achieved in the gain media. By using two laser heads in series, which were symmetrically sited in a linear resonator, the maximum fundamental laser power up to 400 W was obtained with the total pumping power of 1 400 W. A green output power of 230 W with a 56 ns pulse width was achieved at the repetition rate of 10 kHz, by intracavity frequency-doubling with a type- Ⅰ non-critical-matching LBO crystal. The optical-to-optical conversion efficiency was up to 16.8% and the beam quality was better than 30 mm·mrad. The instability of the green laser was no more than 2% with an output of 120 W during 100 hours continuous work time. This laser setup has a simple resonator structure and is easy to adjust. The results show that this system has a high reliability and stability, it is especially suit to engineering application.

关 键 词：LD泵浦 腔内倍频 声光调Q 

分 类 号：TN248[电子电信—物理电子学]