高平均功率腔内和频蓝光Nd∶YAG激光器  

High power blue Nd∶YAG laser by intracavity summing frequency

作　　者：毕勇[1] 孙志培[2] 李瑞宁[2] 张鸿博[2] 侯玮[2] 许祖彦[2] 

机构地区：[1]中国科学院光电研究院光电系统工程部,北京100080 [2]中国科学院物理研究所凝聚态物理国家实验室,北京100080

出　　处：《光学精密工程》2005年第1期16-21,共6页Optics and Precision Engineering

基　　金：中国科学院知识创新工程重大项目(No.KJCX1 05); 国家 863 计划重大项目(No.2002AA311120);北京市科委重大项目(No.H020420060060110)资助

摘　　要：高平均功率蓝光激光是当前固体激光技术研究热点之一。尽管通过 Nd3+的4F3/2→4I9/2态谱线倍频可获得瓦级蓝光输出,然而其准三能级物理特性严重限制其更高功率输出。研究了 Nd3+ 离子4F3/2→4I13/2态1.3μm谱线腔内三倍频产生高平均功率蓝光激光,获得4.3 W蓝光激光输出,重复频率 3.5kHz,脉冲宽度150±10 ns,光束质量M2 因子约为5±1。研究表明:Nd∶YAG晶体1.3μm多谱线振荡是制约实验结果的重要因素,若克服多谱线振荡问题,有望获得10 W级蓝光激光输出。The generation of high average power blue laser is a hotspot direction in solid-state laser technology. Although watt class blue light could be generated by second harmonic generation from the transition of Nd^(3+ )~4F_(3/2)→~4I_(9/2),the output power is severely limited by its nature of quasi-three-level. In this paper, a novel approach for generating high power blue light is investigated, which is based on triple frequency of the Nd∶YAG 1.3 μm line. With intracavity triple frequency, 4.3 W average power at 440 nm was demonstrated at 3.5 kHz and a pulse width of 150±10 ns (FWHM) and the beam quality of M^2 value was 5±1 in both dimensions. Experimental results suggest that Nd∶YAG 1.3 μm multi-line simultaneity oscillating is the main drawback for higher output. If it is overcome,a 10 W class blue laser could be expected.

关 键 词：全固态激光 蓝光 腔内和频 

分 类 号：TN248.1[电子电信—物理电子学]