发光学报, 2019, 40 (8): 1011, 网络出版: 2019-09-02
LD侧面泵浦Nd∶YVO4高重频紫外激光器
LD-side Pumping Nd∶YVO4 High Repetition Rate UV Laser
摘要
研制了二极管(LD)侧面泵浦Nd∶YVO4高重复频率355 nm紫外激光器, 针对Nd∶YVO4激光晶体的增益高、泵浦带宽宽的优点, 激光器采用LD均匀三角侧面泵浦结构, 利用声光调Q方式, 选用Ⅰ类和Ⅱ类相位匹配的LBO非线性晶体, 设计了腔内三倍频V型谐振腔结构, 获得了高重频、高增益的355 nm紫外激光输出。在泵浦LD电流为30 A、重复频率为20 kHz时, 355 nm激光输出最大平均功率达到了8.5 W, 激光脉冲宽度为37 ns, 1 064 nm基频光到355 nm紫外激光的光-光转换效率为25.8%, 紫外激光泵浦阈值约为16 A。
Abstract
The LD side-pumped Nd∶YVO4 high repetition rate 355 nm ultraviolet laser is developed. According to the advantages of high gain and wide pump bandwidth, LD side-pumped structure is designed in the pumping mode of the laser. Using the acousto-optic Q-switched method and selecting the LBO nonlinear crystal with typeⅠand type Ⅱof phase matching, the V-resonance-cavity stucture of the intra-cavity triple frequency is designed. The output of 355 nm ultraviolet laser with high repetition rate and high gain is obtained. A maximum average output power at 355 nm of 8.5 W is obtained when the repetition rate is 20 kHz and the pump current is 30 A. Meanwhlie, the corresponding pulse width is 37 ns at 355 nm, the optical-optical conversion efficiency is 25.8% and the pumping threshold of the UV laser is about 16 A.
崔建丰, 岱钦, 邬小娇, 李福玖, 李业秋, 乌日娜, 杨帆. LD侧面泵浦Nd∶YVO4高重频紫外激光器[J]. 发光学报, 2019, 40(8): 1011. CUI Jian-feng, DAI Qin, WU Xiao-jiao, LI Fu-jiu, LI Ye-qiu, WU Ri-na, YANG Fan. LD-side Pumping Nd∶YVO4 High Repetition Rate UV Laser[J]. Chinese Journal of Luminescence, 2019, 40(8): 1011.