Jun Meng 1Chen Li 1Zhenhua Cong 1,2,3Zhigang Zhao 1,2,3[ ... ]Zhaojun Liu 1,2,3
Author Affiliations
Abstract
1 School of Information Science and Engineering, Shandong University, Qingdao 266237, China
2 Shandong Provincial Key Laboratory of Laser Technology and Application, Qingdao 266237, China
3 Key Laboratory of Laser & Infrared System (Shandong University), Ministry of Education, Qingdao 266237, China
4 Center for Optics Research and Engineering, Shandong University, Qingdao 266237, China
A high-energy 100-Hz optical parametric oscillator (OPO) based on a confocal unstable resonator with a Gaussian reflectivity mirror was demonstrated. A KTA-based OPO with a good beam quality was obtained when the magnification factor was 1.5, corresponding to the maximum signal (1.53 µm) energy of 56 mJ and idler (3.47 µm) energy of 20 mJ, respectively. The beam quality factors (M2) were measured to be M2x = 5.7, M2y = 5.9 for signal and M2x = 8.4, M2y = 8.1 for idler accordingly. The experimental results indicated that the beam quality positively changed with the increase of magnification factors, accompanied by an acceptable loss of pulse energy.
optical parametric oscillators confocal unstable resonator beam quality 
Chinese Optics Letters
2023, 21(5): 051401
Jun Meng 1Chen Li 1Zhenhua Cong 1,2,3Zhigang Zhao 1,2,3[ ... ]Zhaojun Liu 1,2,3,*
Author Affiliations
Abstract
1 School of Information Science and Engineering, Shandong University, Qingdao 266237, China
2 Shandong Provincial Key Laboratory of Laser Technology and Application, Qingdao 266237, China
3 Key Laboratory of Laser & Infrared System (Shandong University), Ministry of Education, Qingdao 266237, China
4 Center for Optics Research and Engineering, Shandong University, Qingdao 266237, China
Beam quality improvements by a large margin for signal and idler beams of a high energy 100 Hz KTiOAsO4 (KTA) non-critical phase matching (NCPM) optical parametric oscillator (OPO) were demonstrated using an unstable resonator configuration instead of a plane-parallel one. Theoretically, influences of cavity lengths and transmission of an output coupler on the OPO conversion efficiency for both were numerically simulated. For OPO based on an unstable resonator with a Gaussian reflectivity mirror, the maximum pulse energies at the signal (1.53 µm) and idler (3.47 µm) were about 75 mJ and 26 mJ, respectively. The corresponding beam quality factors of the signal were Mx2 = 9.8 and My2 = 9.9, and Mx2 = 11.2 and My2 = 11.5 for the idler. As a comparison, 128 mJ of signal and 48 mJ of idler were obtained with the plane-parallel resonator, and the M2 factors of the signal were Mx2 = 39.8 and My2 = 38.4, and Mx2 = 32.1 and My2 = 31.4 for the idler. Compared with a plane-parallel cavity, over eight times and three times brightness improvements were realized for the signal and idler light, respectively.
optical parametric oscillators unstable resonator beam quality 
Chinese Optics Letters
2022, 20(9): 091401
Author Affiliations
Abstract
1 School of Physics and Astronomy, Key Laboratory for Laser Plasmas (Ministry of Education), Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai200240, China
2 School of Information and Electrical Engineering, Hebei University of Engineering, Handan056038, China
Dissipative solitons have been realized in mode-locked fiber lasers in the theoretical framework of the Ginzburg–Landau equation and have significantly improved the pulse energy and peak power levels of such lasers. It is interesting to explore whether dissipative solitons exist in optical parametric oscillators in the framework of three-wave coupling equations in order to substantially increase the performance of optical parametric oscillators. Here, we demonstrate a temporal-filtering dissipative soliton in a synchronously pumped optical parametric oscillator. The temporal-gain filtering of the pump pulse combined with strong cascading nonlinearity and dispersion in the optical parametric oscillator enables the generation of a broad spectrum with a nearly linear chirp; consequently, a significantly compressed pulse and high peak power can be realized after dechirping outside the cavity. Furthermore, we realized, for the first time, dissipative solitons in an optical system with a negative nonlinear phase shift and anomalous dispersion, extending the parameter region of dissipative solitons. The findings may open a new research block for dissipative solitons and provide new opportunities for mid-infrared ultrafast science.
cascading nonlinearity dissipative solitons optical parametric oscillators temporal filtering 
High Power Laser Science and Engineering
2022, 10(2): 02000e16
Author Affiliations
Abstract
1 Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Ultrafast Laser Laboratory, Tianjin, China
2 Leibniz Universität Hannover, Institut für Quantenoptik, Hannover, Germany
3 Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering-Innovation Across Disciplines), Hannover, Germany
Optical vortices, which carry orbital angular momentum, offer special capabilities in a host of applications. A single-laser source with dual-beam-mode output may open up new research fields of nonlinear optics and quantum optics. We demonstrate a dual-channel scheme to generate femtosecond, dual-wavelength, and dual-beam-mode tunable signals in the near infrared wavelength range. Dual-wavelength operation is derived by stimulating two adjacent periods of a periodically poled lithium niobate crystal. Pumped by an Yb-doped fiber laser with a Gaussian (lp = 0) beam, two tunable signal emissions with different beam modes are observed simultaneously. Although one of the emissions can be tuned from 1520 to 1613 nm with the Gaussian (ls = 0) beam, the other is capable of producing a vortex spatial profile with different vortex orders (ls = 0 to 2) tunable from 1490 to 1549 nm. The proposed system provides unprecedented freedom and will be an exciting platform for super-resolution imaging, nonlinear optics, multidimensional quantum entanglement, etc.
nonlinear optics parametric processes optical parametric oscillators ultrafast nonlinear optics 
Advanced Photonics
2020, 2(4): 045001
王波鹏 1,2,3,*粟敬钦 1,3曾小明 1,3周凯南 1,3[ ... ]景峰 1,3
作者单位
摘要
1 中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
2 中国科学技术大学光学与光学工程系, 安徽 合肥 230026
3 中国工程物理研究院等离子体重点实验室, 四川 绵阳 621900
光参量啁啾脉冲放大器(OPCPA)是现阶段最常用的超短超强脉冲放大器之一。参量荧光是OPCPA的本征量子噪声,其形成的脉冲底座会大大降低输出信号脉冲的信噪比。采用数值模拟的方法,研究了不同脉宽比和抽运波形条件下参量荧光的演化规律及其对信噪比的影响。计算结果表明,在增益一定的情况下,随着脉宽比的增大,信噪比与效率-带宽积都呈先增大后减小的趋势。存在一个最佳脉宽比,使得两者同时达到最大。脉宽比小于此最佳值时,随着超高斯抽运光波形阶数的增大,信噪比减小而效率-带宽积增大;脉宽比大于此最佳值时,随着超高斯抽运光波形阶数的增大,信噪比增大而效率-带宽积减小。
激光光学 荧光 光参量振荡器与放大器 超快非线性光学 脉冲 laser optics fluorescence optical parametric oscillators and amplifiers ultrafast nonlinear optics pulses 
光学学报
2016, 36(6): 0614005
作者单位
摘要
华中光电技术研究所—武汉光电国家实验室, 湖北 武汉 430223
采用折叠棱镜腔电光调Q半导体泵浦板条Nd∶YAG激光器作为泵浦源,内腔泵浦Ⅱ类非临界相位匹配KTP光参量振荡器实现1.57 μm人眼安全激光输出,经测试,在-30~55 ℃宽工作温度条件下,激光器工作频率20 Hz时,单脉冲能量58.2 mJ,脉冲宽度7.56 ns,光束发散角约为2 mrad,连续工作1 min,能量稳定性(PTP)优于6.438%,光轴指向稳定性优于0.1 mrad,具备较强环境适应性,目前已实现工程化运用.
宽工作温度 人眼安全光参量振荡器 半导体泵浦 折叠棱镜腔 非临界相位匹配 wide operating temperature eye-safe optical parametric oscillators diode-pumped folding prism resonator non-critical phase match 
光学与光电技术
2015, 13(2): 27
作者单位
摘要
国防科学技术大学 光电科学与工程学院, 长沙 410073
为了研究热致相位失配对中红外连续波单谐振光学参量振荡器(CW-SRO)输出效率的影响, 结合CW-SRO计算模型和热传导方程, 利用有限元分析方法, 重点对输出3.3 μm波长闲频光的CW-SRO进行了分析。计算了不同信号光输出耦合率及不同泵浦功率下CW-SRO晶体输出截面上热致相位失配量的分布。由计算结果可以看出:晶体吸收腔中振荡信号光是导致晶体热效应的主要因素;在相同的输入条件下, 泵浦功率在30 W以上时CW-SRO的热致相位失配将会大大降低其泵浦损耗率;通过增加信号光输出耦合率的方法, 可以减少热致相位失配对CW-SRO输出效率的影响, 但CW-SRO的振荡阈值会增加。
中红外 连续波 光学参量振荡器 热致相位失配 mid-infrared continuous-wave optical parametric oscillators thermal-induced dephasing 
强激光与粒子束
2012, 24(1): 24
作者单位
摘要
1 厦门理工学院数理系,福建 厦门 361024
2 厦门理工学院光电工程技术研究中心,福建 厦门 361024
3 中国科学院长春光学精密机械与物理研究所,长春 130033
报道了一种基于周期性极化晶体PPMgLN、连续波、线性外腔结构、宽带可调谐单谐振光学参量振荡器。泵浦源采用LDA 端面泵浦的Nd:YVO4 连续波1.064 μm 激光器,并通过优化泵浦光与信号光的模式匹配,获得了低阈值、高效率的中红外激光输出。光参量振荡阈值仅为1.09 W,是目前采用外腔结构所报道的最低值。在泵浦功率4.55 W 时,可以获得最大功率为346.8 mW、波长为3.202 μm激光输出,中红外光的光光转化效率达到了7.6%。并通过改变PPMgLN 晶体的极化周期,可以实现中红外2.98~4.19 μm 宽带可调谐激光输出。此中红外激光器结构简单紧凑,可以室温运行。
中红外连续激光 光学参量振荡器 准相位匹配 PPMgLN 晶体 mid-infrared CW laser optical parametric oscillators quasi-phase matching PPMgLN crystal 
光电工程
2011, 38(7): 31
作者单位
摘要
西南技术物理研究所,四川,成都,610041
对内腔光学参量振荡器的工作机理进行了简要分析,报道了一种高效、紧凑的1.57μm人眼安全内腔光学参量振荡器的实验结果.它的泵浦源为水冷闪光灯泵浦KDP电光调Q(Ce,Nd):YAG激光器,采用KTPⅡ类非临界相位匹配,输出信号光脉冲能量最高达87.7mJ,脉宽约7ns,重复频率为10Hz,总电光效率最高达5.8‰,器件外形尺寸为410mm×130mm×80mm.
光学参量振荡器 人眼安全激光器 内腔激光器 固体激光器 Optical parametric oscillators Eye-safe laser Intracavity laser Solid laser 
红外与激光工程
2002, 31(1): 48

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