Author Affiliations
Abstract
1 Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China
2 School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
3 Institute of Novel Semiconductors, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
4 Leibniz-Institut für Kristallzüchtung (IKZ), Berlin 12489, Germany
We present our efforts towards power scaling of Er:Lu2O3 lasers at 2.85 µm. By applying a dual-end diode-pumped resonator scheme, we achieve an output power of 14.1 W at an absorbed pump power of 59.7 W with a slope efficiency of 26%. In a single-end pumped resonator scheme, an output power of 10.1 W is reached under 41.9 W of absorbed pump power. To the best of our knowledge, this is the first single crystalline mid-infrared rare-earth-based solid-state laser with an output power exceeding 10 W at room temperature.
high-power continuous-wave laser mid-infrared laser dual-end pump scheme 
Chinese Optics Letters
2024, 22(1): 011403
作者单位
摘要
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
高功率单频连续波266 nm激光在大容量信息存储、高分辨光谱监测及高精度紫外光刻等领域具有重要应用价值,近年来已成为国内外紫外激光领域的研究热点之一。文中首先综合比较了用于产生高功率266 nm紫外激光的非线性光学晶体基本性能,并根据主要的激光器频率锁定方法,重点分析了Hänsch-Couillaud (H-C)频率锁定和Pound-Drever-Hall (PDH)频率锁定方法的优缺点以及连续波单频266 nm激光器发展现状,介绍了本课题组最新研究成果,即基于H-C频率锁定方法实现了功率1.1 W的单频连续波266 nm紫外激光稳定输出。最后,针对进一步提升全固态单频连续波266 nm激光器性能亟需解决的问题和可能解决路径进行了简要分析和展望。
全固态单频连续波激光器 266 nm 共振增强 频率锁定 all-solid-state single-frequency CW laser 266 nm resonance enhancement frequency locking 
红外与激光工程
2023, 52(4): 20220885
作者单位
摘要
山东大学新一代半导体材料研究院, 山东大学晶体材料国家重点实验室, 济南
报道了脉冲半导体激光器侧面泵浦Nd:YAG同步声光调Q纳秒激光器。采用连续输出50 W的Nd:YAG侧面泵浦模块, 当半导体激光器泵浦脉宽250 μm、重复频率1 kHz、声光Q开关延时270 μm时, 实现了平均输出功率2.27 W、脉冲宽度71 ns的稳定调Q脉冲输出。
侧面泵浦 声光调Q 同步调制 side-pump acoustic-optic Q-switched synchronous modulation 
光电技术应用
2023, 38(1): 42
作者单位
摘要
山东大学新一代半导体材料研究院, 山东大学晶体材料国家重点实验室, 济南
脉冲半导体激光(LD)泵浦被动调Q微片激光器是产生小型化、大能量(mJ量级)、亚纳秒激光脉冲的主要技术途径。基于速率方程理论推导了脉冲LD泵浦被动调Q微片激光器首脉冲建立时间及多脉冲间隔时间方程, 数值求解并分析了泵浦功率、泵浦脉宽等参数对亚纳秒激光输出脉冲数目的影响规律, 在此基础上搭建了脉冲LD端面泵浦YAG/Nd:YAG/Cr4+:YAG微片激光器, 实现了单脉冲能量1.2 mJ、脉冲宽度574 ps、峰值功率2.1 MW, 光束质量因子M2=1.21的1 064 nm近衍射极限亚纳秒脉冲激光输出。
微片激光器 YAG/Nd:YAG/Cr4+:YAG晶体 被动调Q 速率方程 microchip laser YAG/Nd:YAG/Cr4+:YAG crystal passive Q-switching rate equation 
光电技术应用
2022, 28(6): 38
朱宽 1,2,3张鑫 1,2,3鲁文举 1,2,3王菲菲 4[ ... ]王璞 1,2,3,*
作者单位
摘要
1 北京市激光应用技术工程技术研究中心,北京 100124
2 北京工业大学跨尺度激光成型制造技术教育部重点实验室,北京 100124
3 北京工业大学激光工程研究院,北京 100124
4 山东大学晶体材料国家重点实验室,山东 济南 250100
5 暨南大学光子技术研究院,广东 暨南510632
为了研究空芯反谐振光纤的中红外激光传输能力,使用自制的无节点空芯反谐振光纤进行了2.60~4.35 μm的中红外激光传输实验。该空芯反谐振光纤包层由七根平均壁厚为800 nm的玻璃毛细管组成,光纤外径为365 μm,纤芯直径为115 μm。使用中红外可调谐光参量振荡器作为光源,测试了光纤在2.60,3.27,3.41,3.80,4.08,4.21,4.35 μm七个波段的激光传输及损耗特性。结果显示,该光纤可实现2.6~4.08 μm波段低损耗导光,在3.27 μm传输损耗最低,为0.037 dB/m。光纤在4.08 μm和4.35 μm处的传输损耗分别为3.200 dB/m 和0.788 dB/m,而该波段熔融石英吸收损耗分别高达1000 dB/m 和3000 dB/m。研究结果证明,空芯反谐振光纤在中红外激光柔性传输领域拥有巨大潜力。
光纤光学 空芯反谐振光纤 中红外激光 激光传输 fiber optics hollow-core anti-resonant fiber mid-infrared laser laser transmission 
激光与光电子学进展
2022, 59(3): 0306004
Author Affiliations
Abstract
1 Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
2 Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
3 State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan 250100, China
In this paper, the high-repetition-rate passively Q-switched (PQS) and the femtosecond continuous-wave mode-locked (CWML) lasers are successfully obtained with 2D black arsenic-phosphorus (b-AsP) nanosheets as saturable absorber (SA) at 1 μm for the first time, to the best of our knowledge. The saturable absorption properties and ultrafast carrier dynamics of the 2D b-AsP SA are explored by Z-scan and pump-probe techniques. Moreover, according to the measurement of desired nonlinear optical characteristics of the relaxation time of 27 ps and the modulation depth of 7.14%, the PQS and CWML lasers are demonstrated with the highest repetition rate of 2.26 MHz in the PQS laser and the pulse width of 470 fs in the CWML laser. The results show 2D b-AsP SA has enormous potential for pulse modulation in solid-state bulk lasers.
ultrafast lasers mode-locked lasers passively Q-switched lasers nonlinearity 
Chinese Optics Letters
2022, 20(2): 021408
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 4.3 µm mid-infrared (MIR) optical parametric oscillator (OPO) based on ZnGeP2 (ZGP) crystal is demonstrated. An acousto-optically Q-switched Ho:Y3Al5O12 laser operating at 2.1 µm 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 4.07 µm and 10.62 W at 4.3 µm. 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, Mx2=1.8, My2=2.0, and RMS<1.9% at 8 h, respectively. Our results pave a way for designing high-power and high-efficiency 4–5 µm MIR laser sources.
mid-infrared laser optical parametric oscillator nonlinearity 
Chinese Optics Letters
2022, 20(1): 011403
毛佳佳 1胡平 2周雪 1王华行 1[ ... ]何京良 1,2,*
作者单位
摘要
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
3 山东大学深圳研究院,广东 深圳 518057
稀土离子Tm3+/ Ho3+ 掺杂中红外2 μm波段超快激光由于广泛的应用前景成为近十余年来激光领域的研究热点之一。文中首先综述了稀土离子Tm3+/Ho3+掺杂固体/光纤2 μm波段超快激光锁模技术进展,包括主动锁模技术以及饱和吸收、克尔透镜、非线性偏振旋转、非线性光环形镜、非线性多模干涉等被动锁模技术;其次,结合激光增益介质及色散管理技术回顾了Tm3+/ Ho3+掺杂固体和光纤锁模激光脉冲宽度压缩进展;再次,总结了Tm3+/ Ho3+大能量/高功率超快激光技术及进展;最后,对2 μm波段超快激光发展趋势进行了总结和展望。
Tm3+/ Ho3+ 2 μm波段 锁模激光 主动锁模 被动锁模 Tm3+/ Ho3+ 2 μm wave band mode-locked laser active mode-locking passive mode-locking 
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 Er3+-, Ho3+-, and Dy3+-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
Author Affiliations
Abstract
1 State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan 250100, China
2 Summa Semiconductor Oy, Micronova, Espoo FI-00076, Finland
3 Department of Electronics and Nanoengineering, Aalto University, Espoo FI-00076, Finland
4 e-mail: yhyanghe@gmail.com
Indium arsenide phosphide (InAsP) nanowires (NWs), a member of the III–V semiconductor family, have been used in various photonic and optoelectronic applications thanks to their unique electrical and optical properties such as high carrier mobility and adjustable band gap. In this work, we synthesize InAsP NWs and further explore their nonlinear optical properties. The ultrafast carrier dynamics and nonlinear optical response are thoroughly studied based on the nondegenerate pump probe and Z-scan experimental measurements. Two different characteristic carrier lifetimes (2 and 15 ps) from InAsP NWs are observed during the excited-carrier relaxation process. Based on the physical model analysis, the relaxation process can be ascribed to the carrier cooling process via carrier-phonon scattering and Auger recombination. In addition, based on the measured excited-carrier lifetime and Pauli-blocking principle, we discover that InAsP NWs show strong saturable absorption properties at the wavelengths of 532 and 1064 nm. Last, we demonstrate for the first time a femtosecond (426 fs) solid-state laser based on an InAsP NWs saturable absorber at 1.04 μm. We believe that our work provides a better understanding of the InAsP NWs optical properties and will further advance their photonic applications in the near-infrared range.
Photonics Research
2021, 9(9): 09001811

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