外腔谐振倍频8.7W连续单频绿光技术研究  

Technical Study of 8.7 W Continuous Wave Single Frequency Green Laser Based on Extra-Cavity Frequency Doubling

作　　者：许夏飞 鲁燕华[1,2] 张雷[1,2] 王卫民[1,2] Xu Xiafei Lu Yanhua Zhang Lei Wang Weimin(Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China Key Laboratory of Science and Technology on High Energy Laser, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China)

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900 [2]中国工程物理研究院高能激光科学与技术重点实验室,四川绵阳621900

出　　处：《中国激光》2016年第11期58-62,共5页Chinese Journal of Lasers

基　　金：国家863计划(2014AA093301);中国科学院国防创新基金

摘　　要：基于Pound—Drever-Hall外腔谐振倍频技术，实现了单频、连续1064nm基频光的高效倍频转换。精确锁定环形倍频腔腔长，利用I类非临界相位匹配三硼酸锂晶体获得了最高8．73W的倍频绿光输出，倍频效率为68．9％。在此基础上，研究了倍频绿光的波长锁定与调谐特性，当30min内波长锁定均方根值小于3fm时，实现了输出绿光波长在532．15～532．50nm范围内的连续可调。采用自外差拍频法测量了单频绿光的光谱特性，谱线线宽为18．7kHz，光束质量因子为1．25，光束质量优异。Highly effective frequency doubling conversion of continuous wave, single frequency 1064 nm fundamental laser is realized based on the Pound-Drever-Hall extra-cavity frequency doubling technique. When the length of the ring frequency doubling cavity is accurately locked, the green laser output with the highest power of 8.73 W is obtained with the use of the type I noncritical phase matching lithium triborate crystal and the frequency conversion efficiency reaches 68.9%. Based on this, the green laser wavelength locking and tuning characteristics are investigated, and when the root-mean-square value of wavelength locking within 30 min is less than 3 fro, the wavelength is continuously tunable between 532.15 nm and 532.50 nm. The spectroscopic property of the single frequency green laser is measured by the self-heterodyne method, the measured line-width is 18.7 kHz, and the beam quality factor is 1.25 which indicates a superior beam quality.

关 键 词：激光技术 绿光 窄线宽 外腔谐振倍频 单频 

分 类 号：TN248[电子电信—物理电子学]