摘要
研究了激光二极管端面泵浦Nd:YVO4/Ga As被动调Q激光器的输出特性。在连续光运转和调Q运转情况下,得到的激光最高输出斜效率分别为41.5%和11.4%。用一片700μm厚的Ga As薄片作为饱和吸收体,对1.06μm激光透过率为6.5%的平面镜作为15 mm谐振腔的耦合输出镜,得到的最短脉宽仅为1.9 ns。在泵浦功率由0.5 W上升到5.6 W的过程中,用T为6.5%和20%的输出镜得到的脉冲重复频率从18.7和23.9 k Hz分别上升到53和41.3 k Hz。两种输出镜透过率下得到的最大脉冲能量分别为8.5和13.3μJ,相应的峰值功率高达4.45和4.6 k W。此激光器具有非常高的振幅稳定性,在高泵浦功率下调Q脉冲振幅波动小于3%。
We addressed the output properties of adiode-end-pumped Nd.YVQ/GaAs laser passively Q-switched with GaAs saturable absorber. The maximum output slope efficiencies of the continuous wave （CW） and Q-switching operation were 4]. 5% and 11.4%. We obtained the shortest pulse width of only 1.9 ns with a 700pm thick GaAs wafer as a satuable absorber and a plane mirror of T=6.5% as a output coupler （OC） of a 15 mm tong laser cavity. Pulse repetition frequency acquired by T= 6.5% and T= 20% OCs respectively increased from 18.7 and 23.9 kHz to 53 and 41.3 kHz in the increasing process of absorbed pumping power from O. 5 to 5.6 W. The biggest pulse energy obtained through these two OCs was 8.5 and 13.3 IJJ, whose peak powers were 4.45 and 4.6 kW. This Q-switched Nd. YVO4/GaAs laser had very high amplitude stability, whose Q-switched pulse amplitude fluctuation was less than 3% for high pump power.
出处
《山东科学》
CAS
2015年第2期87-92,共6页
Shandong Science
基金
国家自然科学基金(61205174)
