摘要
一种新型的掺镱硅酸盐晶体Yb^(3+)∶Sc_2SiO_5(Yb∶SSO)因其良好的激光特性而在近年来受到关注。从理论上计算了Yb∶SSO晶体在不同的抽运功率情况下的热透镜焦距,分析了晶体材料负折射率系数对激光器的影响。实验中采用平平短腔结构,研究了准连续(QCW)976nm激光二极管端抽运Yb∶SSO激光特性。在重复频率为50Hz、脉冲宽度为500μs、峰值抽运功率为128.8 W时,得到峰值功率为27.6 W的激光输出,光-光转换效率为21.4%。此时x和y方向上的光束质量因子M2为1.24和1.20。在实验中发现激光中心波长随抽运功率变化的规律,并理论分析了实验结果中双波长非同步起振的原因。
A new Yb-doped silicate Yb3＋ ：Sc2SiO5 （Yb：SSO） has gained considerable attention in recent years because of its advantageous laser properties. Thermal lens focal length of Yb .＂ SSO in the case of different pump powers is calculated theoretically, and the influence of the material negative refractive index on the laser is analyzed. Quasi-continuous wave （QCW） lasing performance of the Yb ： SSO end-pumped by a 976 nm laser diode （LD） in a plane-plane cavity is studied. Laser output with peak power of 27.6 W and optical-to-optical conversion efficiency of 21.4% is obtained when pump laser is with repetition rate of 50 Hz, pulse width of 500 μs and peak pump power of 128.8 W. Meanwhile, beam qualities factors （M2） in x and y directions are 1.24 and 1.20, respectively. Finally, the law of center-wavelength movement caused by the change of pump power is observed, and the cause of dual- wavelength asynchronous oscillation is theoretically analyzed.
作者
姜豪
徐浏
陈小明
郑丽和
童立新
刘娇
阮旭
王君涛
苏良碧
高清松
Jiang Hao Xu Liu Chen Xiaoming Zheng Lihe Tong Lixin Liu Jiao Ruan Xu Wang Juntao Su Liangbi Gao Qingsong(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 Graduate School, China Academy of Engineering Physics, Beijing 100088, China Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2016年第11期40-44,共5页
Chinese Journal of Lasers
基金
国家自然科学基金委员会-中国工程物理研究院联合基金(U1530152)
