摘要
基于LAS-CAD软件,设计并优化出结构紧凑的激光二极管(LD)双端抽运声光调QNd∶YVO4激光器。采用双凹折叠腔结构,808 nm光纤耦合输出LD双端面抽运Nd∶YVO4激光晶体,腔长185 mm,耦合输出镜透射率为15%。在44 W抽运功率时,连续激光最高输出功率达到18.6 W,光-光转换效率为42.3%,斜率效率为47.8%,M2因子约为1.5。在重复频率为100 kHz时,LD抽运功率为41 W,获得激光最大平均功率输出为11.3 W,光-光转换效率约为27.6%,相应单脉冲能量约为113μJ,脉冲半峰全宽(FWHM)为25 ns,峰值功率为4.52 kW。
According to LAS-CAD software,a compact laser diode（LD） dual-end-pumped acousto-optic Q-switched Nd∶YVO4 laser is designed and optimized.In the experiment,an 808 nm fiber-coupled system and double concave face mirror folded cavity are adopted.The length of resonance cavity is 185 mm and the transmission of output coupler is 15%.A TEM00 mode output of 18.6 W is obtained under the condition of continuous waves（CW） at a pump power of 44 W,resulting in an optical conversion efficiency of 42.3%,and a slope efficiency of 47.8%,and M2 of 1.5.An 11.3 W of 1064 nm average power at a repetition rate of 100 kHz is generated with a 41 W LD as pump source,and an optical-to-optical conversion efficiency of 27.6% is obtained.The steady operation is achieved with pulse width of 25 ns,peak power of 4.52 kW and single pulse energy of 113 μJ at the repetition rate.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第7期1673-1677,共5页
Chinese Journal of Lasers
