红外与激光工程
2023, 52(8): 20230403
1 江苏师范大学 物理与电子工程学院, 江苏省先进激光材料与器件重点实验室, 江苏 徐州 221116
2 江苏锡沂高新材料产业技术研究院, 江苏 徐州 221400
3 江苏大学 机械工程学院, 江苏 镇江 212013
太阳光直接泵浦固体激光器相对于传统二极管泵浦激光器具有能耗低、效率高等优势, 在大气传感、深空通信及**安全等重要领域具有极大的应用潜力, 战略意义重大。本文综述了太阳光直接泵浦固体激光器的阳光收集光学系统、增益介质及泵浦系统设计的国内外研究进展, 揭示了其与激光输出质量及光转化效率提升的定向关联。提出在太阳光直接泵浦固体激光器发展中, 高汇聚效率及高功率的激光输出是核心研究目标, 而高品质增益介质是实现上述目标的关键所在。最后, 展望了太阳光直接泵浦固体激光器的未来发展趋势。
太阳光直接泵浦 固体激光器 阳光收集光学系统 增益介质 泵浦系统 direct solar pumping solid-state laser sunlight collecting optical system gain medium pump system
Nd:LuVO4晶体因具有相比于Nd:YVO4 和 Nd:GdVO4晶体更大的吸收和发射截面而受到广泛关注。一种高效的泵浦方式因此而产生：将Nd3+离子直接泵浦到4F3/2激光上能级来改善激光器参数，不仅可以减小激光器的阈值，提高激光器的斜效率，并且可以降低非辐射跃迁过程中所产生的热量。利用888 nm激光二极管直接泵浦Nd:LuVO4晶体，实现了准三能级Nd:LuVO4激光器。当入射泵浦功率为18.6 W时，916 nm的输出功率为2.5 W，激光器的阈值功率为4.7 W，相应的斜效率为17.8%。入射泵浦功率不变的情况下，获得的最大蓝光输出功率为743 mW。蓝光输出功率的稳定性高于3%。光束质量M2的值为1.12。
二极管泵浦 直接泵浦 Nd:LuVO4晶体 深蓝激光器 diode-pumped direct pumped Nd:LuVO4 crystal deep-bluelaser
量子光学与光量子器件国家重点实验室, 山西大学光电研究所, 山西 太原 030006
设计了全固态连续单横模671 nm红光激光器。利用880 nm LD双端端面泵浦Nd:YVO4复合晶体,实现了均匀泵浦并改善了激光晶体热效应;考虑到影响倍频转化效率的各种因素,优化设计了Z字形四镜激光谐振腔,采用Ⅰ类临界相位匹配晶体LBO作为腔内倍频晶体;当泵浦功率为42.5 W时,获得了5.2 W的连续单横模671 nm红光输出,光-光转化效率达到12.2％,激光器长期功率稳定性优于±2.5％(1 h)。
671 nm红光激光器 单横模 LD双端直接泵浦 倍频转化效率 671 nm red laser TEM00 mode dual-end-pumped at 880 nm frequency-doubling efficiency
Author Affiliations
Abstract
1 Key Laboratory of Functional Crystal and Lasertechnology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2 Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
4 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
The capabilities of a compact and highly efficient NdAl3(BO3)4 (NAB) thin-disk laser are demonstrated. Under a pump power of 8.2 W, the NAB disk laser delivers an average output power of 4.6 W at 1 063 nm, with a slope efficiency of 64%. The difficulty and complexity of the thin-disk laser design are minimized by the high absorbance of the NAB crystal. To reduce the thermal effect, low repetition frequency pulsed 885 nm direct pumping is considered an efficient way to realize a compact and highly efficient NAB thin-disk laser.
自激活晶体 碟片激光器 直接泵浦 140.3380 Laser materials 140.3530 Lasers, neodymium 140.5560 Pumping Chinese Optics Letters
2011, 9(11): 111402
量子光学与光量子器件国家重点实验室, 山西大学光电研究所, 山西 太原 030006
针对激光二极管端面纵向泵浦Nd:YVO4激光器，本文理论和实验详细研究了Nd:YVO4晶体的热透镜效应。在激光二极管的中心波长分别为808 nm和880 nm及分别采用单端端面纵向泵浦和双端端面纵向泵浦结构情况下，实验测量了Nd:YVO4晶体的热透镜焦距，实验结果和理论预测基本吻合。同时在泵浦功率60 W时获得了18.8 W的连续基横模激光输出。
端面泵浦固体激光器 热透镜效应 直接泵浦 all-solid-state lasers thermal lensing effect pump directly at 880 nm
Author Affiliations
Abstract
1 Research Center of Laser Physics and Technology, Key Laboratory of Functional Crystal and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2 Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3 Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
A passively mode-locked grown-together composite YVO4/Nd:YVO4 crystal laser is demonstrated with a semiconductor saturable absorber mirror by 880-nm laser-diode direct pumping. Under the absorbed pump power of 24.9 W, a maximum output power of 10.5 W at the repetition rate of 77 MHz is obtained, corresponding to the optical-optical conversion efficiency of 42.1% and the slope efficiency of 53.4%. The pulse width measured is 33 ps at the output power of 10 W.
生长键合YVO4/Nd:YVO4晶体 直接泵浦 锁模 半导体可饱和吸收镜 140.3480 Lasers, diode-pumped 140.3580 Lasers, solid-state 140.4050 Mode-locked lasers 160.3380 Laser materials Chinese Optics Letters
2011, 9(4): 041405
Author Affiliations
Abstract
1 School of Science, Changchun University of Science and Technology, Changchun 130022, China
2 Xi'an Institute of Applied Optics, Xi'an 710065, China
3 Jilin Junkun Optoelectronics Co. Ltd., Changchun 130012, China
In diode pumped Nd:YAG lasers, the quantum defect is the most important parameter determining the thermal load of the laser crystal, which can be dramatically reduced by pumping directly into the upper laser level. A compact folded three-mirror cavity with a length of 105 mm is optimized to obtain a highly effcient 473-nm laser. When the absorbed pump power (with 15.8-W incident pump power) at 885 nm into Nd:YAG is 10 W, a continuous-wave 473-nm blue laser as high as 2.34 W is achieved by LBO intra-cavity frequency doubled. The optical-to-optical conversion effciency is 14.8%. To the best of our knowledge, this is the highest e±ciency at 473 nm by an intra-cavity doubled frequency Nd:YAG laser.
激光器 直接泵浦 Nd:YAG 蓝光 140.3480 Lasers, diode-pumped 140.3580 Lasers, solid-state 140.7300 Visible lasers 140.3530 Lasers, neodymium Chinese Optics Letters
2010, 8(2): 187
中国工程物理研究院,激光聚变研究中心,四川,绵阳,621900
研究了一种采用新型泵浦耦合方式的固体激光器.大功率环形LD阵 列紧密环绕棒状Nd3+:YLF增益介质进行直接泵浦,泵浦光的利用率和泵浦均匀性有 较大提高,1 054nm波长处的自由振荡脉冲能量输出最大达1.01J,激光器的效率有显著提高.
环形LD 直接泵浦 效率 均匀性 自由振荡 ring-LD pump-coupling side-pumping efficiency distribution
