Tm:YLF谐振泵浦Ho:YAG主动调Q多波长激光器  

Tm:YLF Resonantly Pumped Ho:YAG Actively Q-Switched Multi-Wavelength Laser

作　　者：庞帅 张新陆 

机构地区：[1]天津工业大学物理科学与技术学院,天津

出　　处：《光电子》2023年第1期21-28,共8页Optoelectronics

摘　　要：中红外多波长固体激光器因其在不同领域的广泛应用而受到关注。本文基于此,搭建了Tm:YLF谐振泵浦Ho:YAG主动调Q内腔式固体激光器。选用掺杂浓度为2.5%的Ho:YAG作为激光增益介质,通过改变腔内损耗,调控反转粒子数比率,进而改变腔内振荡波长。研究表明,在调制频率为4 kHz、泵浦功率为8.492 W时,获得了最大输出功率为1.467 W,平均脉冲宽度为50 ns,对应的光光转化效率为17.3%,斜效率约为21%。在连续运转模式下,腔内仅存在单一2122.41 nm波长振荡,而在脉冲运转模式下,腔内振荡波长为2090 nm、2097 nm、2122 nm同步振荡。输出激光沿x方向和y方向的光束质量分别为1.64和1.65,输出模式为基横模。Mid-infrared multi-wavelength solid-state lasers are of interest due to their wide range of applications in different fields. In this paper, a Tm:YLF resonantly pumped Ho:YAG actively Q-switched internal cavity solid-state laser is built based on this. Ho:YAG with a doping concentration of 2.5% is chosen as the laser gain medium, and the inversion particle number ratio is modulated by changing the intracavity loss, which in turn changes the intracavity oscillation wavelength. It is shown that a maximum output power of 1.467 W with an average pulse width of 50 ns is obtained at a modulation frequency of 4 kHz and a pump power of 8.492 W, corresponding to a photo-optical conversion efficiency of 17.3% and a slope efficiency of about 21%. In continuous wave operation mode, only a single 2122.41 nm wavelength oscillation is present in the cavity, while in pulsed wave operation mode, the cavity oscillates at 2090 nm, 2097 nm and 2122 nm simultaneously. The beam quality of the output laser is 1.64 and 1.65 in the x and y directions respectively, with the output mode being fundamental transverse mode.

关 键 词：HO:YAG 多波长 固体激光器 

分 类 号：TN2[电子电信—物理电子学]