红外与激光工程
2023, 52(4): 20220885
Author Affiliations
Abstract
1 State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan 250100, China
2 Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China
3 Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
4 State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an 710119, China
In this paper, a high-power and high-efficiency mid-infrared (MIR) optical parametric oscillator (OPO) based on (ZGP) crystal is demonstrated. An acousto-optically Q-switched laser operating at with a maximum average output power of 35 W and pulse width of 38 ns at a repetition rate of 15 kHz is established and employed as the pump source. A doubly resonant OPO is designed and realized with the total MIR output power of 13.27 W, including the signal and idler output power of 2.65 W at and 10.62 W at . The corresponding total optical-to-optical and slope efficiencies are 37.9% and 67.1%, respectively. The shortest pulse width, beam quality factor, and output power instability are measured to be 36 ns, , , and at 8 h, respectively. Our results pave a way for designing high-power and high-efficiency 4– MIR laser sources.
mid-infrared laser optical parametric oscillator nonlinearity Chinese Optics Letters
2022, 20(1): 011403
红外与激光工程
2021, 50(8): 20210436
Author Affiliations
Abstract
1 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
2 Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China
Mid-infrared (MIR) laser sources operating in the 2.7–3 µm spectral region have attracted extensive attention for many applications due to the unique features of locating at the atmospheric transparency window, corresponding to the “characteristic fingerprint” spectra of several gas molecules, and strong absorption of water. Over the past two decades, significant developments have been achieved in 2.7–3 µm MIR lasers benefiting from the sustainable innovations in laser technology and the great progress in material science. Here, we mainly summarize and review the recent progress of MIR bulk laser sources based on the rare-earth ions-doped crystals in the 2.7–3 µm spectral region, including -, -, and -doped crystalline lasers. The outlooks and challenges for future development of rare-earth-doped MIR bulk lasers are also discussed.
mid-infrared laser 2.7–3 µm spectral region Er3+, Ho3+, and Dy3+-doped crystal Chinese Optics Letters
2021, 19(9): 091407
1 山东大学信息科学与工程学院, 山东 青岛 266237
2 山东大学晶体材料研究所, 山东 济南 250100
时至今日,非线性光学材料在光电子、通信、信息处理等领域的重要作用日益突出,发展新型、优良的非线性光学材料迫在眉睫。与传统的无机非线性光学材料相比,有机非线性光学材料在损伤阈值、响应时间和非线性光学系数上具有决定性优势。沸石咪唑酯骨架结构材料(ZIFs)是一类以咪唑或其衍生物为配体的特殊金属有机骨架结构材料,其以结构多样性、高度的热学和化学稳定性,近年来受到了国内外研究者的关注。本文总结了沸石咪唑酯骨架结构材料制备方法以及非线性光学特性的研究进展,并就沸石咪唑酯骨架结构材料在非线性光学领域的应用前景进行了展望。
材料 非线性光学材料 纳米材料 金属有机纳米骨架 沸石咪唑酯骨架结构 调Q 中国激光
2021, 48(12): 1203001
商景诚 1,2,3刘一州 1,2赵圣之 1,2冯天利 1,2,3,*[ ... ]李涛 1,2,3,**
1 山东大学信息科学与工程学院, 山东 青岛 266237
2 山东大学山东省激光技术与应用重点实验室, 山东 青岛 266237
3 山东大学激光与红外系统集成技术教育部重点实验室, 山东 青岛 266237
4 山东大学晶体材料研究所, 山东 济南 250100
光参量啁啾脉冲放大器(OPCPA)在实现高功率、大能量、光学周期量级的超短激光脉冲输出方面极具优势。对具有高脉冲重复频率(≥1 kHz)的OPCPA系统展开研究讨论,全面介绍OPCPA系统的组成;针对不同波段的OPCPA系统,对泵浦源、前端、光参量放大级和压缩器等关键模块分别进行对比和讨论,对限制OPCPA系统性能提升的因素进行分析;最后总结不同输出波长的高重复频率OPCPA系统的研究现状,并对未来的发展方向进行展望。
激光技术 光参量啁啾脉冲放大器 超快激光 高功率 高重复频率 光学周期 中国激光
2021, 48(12): 1201004
Author Affiliations
Abstract
1 State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan 250100, China
2 Key Laboratory of Crystal Materials, Ningbo University, Ningbo 315211, China
3 Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
In this paper, the absorption and fluorescence spectra of , co-doped (Er,Pr:YLF) crystal were measured and analyzed. The co-doping was proved to effectively enhance the mid-infrared transition at the 2.7 μm with 74.1% energy transfer efficiency from to . By using the Judd–Ofelt theory, the stimulated emission cross section was calculated to be at 2685 nm and at 2804.6 nm. Moreover, a diode-end-pumped Er,Pr:YLF laser operating at 2659 nm was realized for the first time, to the best of our knowledge. The maximum output power was determined to be 258 mW with a slope efficiency of 7.4%, and the corresponding beam quality factors and . Our results suggest that Er,Pr:YLF should be a promising material for 2.7 μm laser generation.
mid-infrared lasers laser materials solid-state lasers Chinese Optics Letters
2021, 19(8): 081404
1 山东大学新一代半导体材料研究院晶体材料国家重点实验室, 山东 济南 250100
2 南京大学固体微结构物理国家重点实验室, 江苏 南京 210093
基于光学超晶格的光参量振荡技术是研制2~5 μm波段中红外相干光源的有效技术手段,在遥感探测、精密测量、环境监测、医疗诊断、科学研究和****等领域具有非常重要的应用价值。总结了光学超晶格2~5 μm中红外光参量振荡器的国内外研究进展,重点分析了连续波、纳秒脉冲以及皮秒脉冲等不同运转模式下光参量振荡器的结构特点、优势和发展前景。并对光学超晶格中红外光参量振荡器的发展趋势进行了展望,指出高功率、宽调谐、低功耗、小型化和轻量化是光学超晶格光参量振荡器的重要发展方向,而高质量大尺寸(厚度)的光学超晶格晶体、性能优异的泵浦源和可靠的工程化样机设计是未来光参量振荡器发展的核心技术。
激光光学 光学超晶格晶体 光参量振荡器 中红外激光
1 山东大学晶体材料国家重点实验室, 新一代半导体材料研究院, 山东 济南 250100
2 山东大学激光与红外系统集成技术教育部重点实验室, 山东 青岛 266237
基于光学超晶格的光参量振荡技术是产生2~5 μm中红外光源的有效途径,在大气环境监测、医疗诊断、精密光谱分析、光电对抗等领域具有重要的应用价值。针对小型化中红外激光器应用需求,开展了结构紧凑、高效率、宽调谐的纳秒光纤激光泵浦的周期极化掺镁铌酸锂光学超晶格(MgO∶PPLN)光参量振荡器(OPO)的研究。采用1.06 μm纳秒光纤激光泵浦多周期(29~31.6 μm)MgO∶PPLN晶体,结合周期和温度调谐,实现了闲频光2.37~4.01 μm连续调谐中红外激光输出。当泵浦功率为9.95 W时,2.37~3.75 μm平均输出功率均大于1.7 W,其中3.4 μm平均输出功率最大,相应的功率和光光转化效率分别为3.68 W和37%。重点讨论了在2.4、2.7、3.8和4.0 μm处的中红外激光输出特性,最大平均输出功率可分别达到2.87、2.45、1.87和1.22 W,相应的光光转化效率分别为17.2%、19.8%、11.2%和8.6%。本文的研究结果为小型化宽调谐中红外激光器的研发提供了重要的实验依据。
激光器 中红外激光 光参量振荡器 MgO∶PPLN 晶体; 宽调谐
Author Affiliations
Abstract
1 International School for Optoelectronic Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250300, China
2 Department of Chemistry, Shanghai University, Shanghai 200444, China
3 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
4 School of Electronic and Information Engineering (Department of Physics), Qilu University of Technology (Shandong Academy of Sciences), Jinan 250300, China
5 State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250300, China
6 Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Two-dimensional (2D) Te nanosheets were successfully fabricated through the liquid-phase exfoliation (LPE) method. The nonlinear optical properties of 2D Te nanosheets were studied by the open-aperture Z-scan technique. Furthermore, the continuous wave mode-locked Nd:YVO4 laser was successfully realized by using 2D Te as a saturable absorber (SA) for the first time, to the best of our knowledge. Ultrashort pulses as short as 5.8 ps were obtained at 1064.3 nm with an output power of 851 mW. This primary investigation indicates that the 2D Te SA is a promising photonic device in the fields of ultrafast solid-state lasers.
tellurium Z-scan saturable absorber ultrafast solid-state laser Chinese Optics Letters
2021, 19(3): 031401