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Compact All-Fiber 102W Picosecond MOPA Laser with a Narrow Spectral Linewidth

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Chinese Physics Letters 2011年第11期28卷 121-123页

作者： WU Wen-Di REN Ting-qi ZHOU Jun DU Song-Tao GU Xi-Jia lou qi-hong College of Physics and Engineering Qufu Normal UniversityQufu 273165 Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800 Department of Electrical and Computer Engineering Ryerson UniversityTorontoCanada

We report an all-fiber-based master oscillator power amplifier picosecond ytterbium-doped fiber laser with an average power of 102W and a spectral line width of 0.1 *** seed source is a compact single mode passively mode-locked fiber laser with an average power of 2.48 ***,the laser maximum average output power of 102W picosecond pulses is realized by a direct all-fiber amplifier structure in one *** experiment enables the optical-to-optical conversion efficiency to reach 61.4%,with the central wavelength of 1063.7nm.A significant feature of this experiment is the spectral line width of 0.1 *** spectrum has no broadening or nonlinear effects when the pump is strengthened.

关键词： amplifier fiber pump

Controllable Dual-Wavelength Fiber Laser

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Chinese Physics Letters 2012年第7期29卷 103-105页

作者： LI Zhen ZHOU Jun HE Bing LIU Hou-Kang LIU Chi WEI Yun-Rong DONG Jing-Xing lou qi-hong Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai Key Laboratory of All Solid-State Laser and Applied TechniquesShanghai 201800 Graduate School of the Chinese Academy of Sciences Beijing 100039

We demonstrate a controllable dual-wavelength fiber laser which contains a master laser and a slave *** master laser is a kind of ring cavity laser which can be injected into by the slave *** output laser wavelength is controlled by injected power of the slave laser;both single- and dual-wavelength operation can be *** free running,the master laser generates 1064 nm laser *** the slave laser is a 1072 nm fiber *** 1064nm and 1072 nm laser coexist in output spectrum for relatively low injected ***-wavelength and power-ratio-tunable operation can be *** the injected power of the slave laser is high enough,the 1064nm laser is extinguished automatically and there is only 1072nm laser output.

关键词： fiber Dual tunable

High Power Passive Phase Locking of Four Yb-Doped Fiber Amplifiers by an All-Optical Feedback Loop

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Chinese Physics Letters 2011年第5期28卷 147-150页

作者： XUE Yu-Hao HE Bing ZHOU Jun LI Zhen FAN Yuan-Yuan qi Yun-Feng LIU Chi YUAN Zhi-Jun ZHANG Hai-Bo lou qi-hong Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800 Graduate University of Chinese Academy of Sciences Beijing 100049

We report the passive phase locking of four high power Yb-doped fiber amplifiers with ring *** interference patterns at different output power are observed and the Strehl ratios are *** maximum coherent output power of the fiber array is up to 1062 W by multi-stage *** stable beam profiles of various phase relationships are observed by controlling the position of the feedback fiber,in good agreement with the calculated *** using master oscillator power-amplifier(MOPA)architecture and broadband operation of passively phased systems,higher power scaling with high beam quality appears to be feasible.

关键词： fiber passive amplifier

高性能透明激光陶瓷及陶瓷激光器的最新应用进展

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红外与激光工程 2008年第6期37卷 993-997页

作者：楼祺洪漆云凤周军蔡虹中国科学院上海光学精密机械研究所上海201800

激光陶瓷的出现,为固体激光材料向高功率、大尺寸、多功能发展提供了全新的途径,从而为激光技术的发展提供了更加灵活广阔的设计空间。介绍了近年来国际国内透明激光陶瓷及陶瓷激光器发展的最新进展,并展望了陶瓷激光器的未来发展价值... 详细信息

激光陶瓷的出现,为固体激光材料向高功率、大尺寸、多功能发展提供了全新的途径,从而为激光技术的发展提供了更加灵活广阔的设计空间。介绍了近年来国际国内透明激光陶瓷及陶瓷激光器发展的最新进展,并展望了陶瓷激光器的未来发展价值。高功率陶瓷激光器方面:中科院上海光学精密机械研究所采用超均匀侧面泵浦技术在1at.%Nd:YAG陶瓷棒中获得输出功率236W,斜率效率62%的连续激光输出。美国利弗莫尔实验室采用Sm3+包边Nd:YAG复合结构陶瓷热容激光器实现了5Hz,67kW激光输出。陶瓷激光器方面,日本***实验室采用掺杂浓度为15at.%的Yb:YSAG透明陶瓷,获得脉冲宽度280fs,平均输出能量为62mW的锁模脉冲激光输出。陶瓷自调Q脉冲激光器和陶瓷光纤激光器亦有很大进展。陶瓷激光器的开发和应用不仅延伸到传统固体激光器的各个研究领域,并且能够不断突破现有固体激光技术的局限,有望推动未来固体激光工程向更广阔的空间发展。

关键词：激光陶瓷陶瓷激光器透明陶瓷

Lagrangian coherent structure analysis on transport of Acetes chinensis along coast of Lianyungang,China

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Journal of Oceanology and Limnology 2024年第1期42卷 345-359页

作者： Kexin WANG Xueqing ZHANG qi lou Xusheng XIANG Ying XIONG College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Environment and Ecology Ministry of Education of ChinaOcean University of ChinaQingdao 266100China Jiangsu Marine Fisheries Research Institute Nantong 226007China

Spatial heterogeneity or“patchiness”of plankton distributions in the ocean has always been an attractive and challenging scientific issue to *** focused on the accumulation and dynamic mechanism of the Acetes chinensis in the Lianyungang nearshore licensed fishing *** Lagrangian frame approaches including the Lagrangian coherent structures theory,Lagrangian residual current,and Lagrangian particle-tracking model were applied to find the transport pathways and aggregation characteristics of Acetes *** exist some material transport pathways for Acetes chinensis passing through the licensed fishing area,and Acetes chinensis is easy to accumulate in the licensed fishing *** main mechanism forming this distribution pattern is the local circulation induced by the nonlinear interaction of topography and tidal *** the Lagrangian coherent structure analysis and the particle trajectory tracking indicate that Acetes chinensis in the licensed fishing area come from the nearshore *** work contributed to the adjustment of licensed fishing area and the efficient utilization of fishery resources.

关键词： plankton accumulation hydrodynamic model Lagrangian particle-tracking model Lagrangian analysis

The Improved Power of the Central Lobe in the Beam Combination and High Power Output

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Chinese Physics Letters 2012年第4期29卷 82-85页

作者： LIU Hou-Kang XUE Yu-Hao LI Zhen HE Bing ZHOU Jun DING Ya-qian JIAO Meng-Li LIU Chi qi Yun-Feng WEI Yun-Rong DONG Jing-Xing lou qi-hong Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800 Graduate University of Chinese Academy of Sciences Beijing 100049

In order to increase the power fraction of the central lobe in the coherent beam combination of lasers in an array,the effects of the distance factor of near-field distribution on far-field interference patterns are calculated and demonstrated *** improved beam array of interwoven distribution is demonstrated to enable the power in the central lobe to reach 41%.An optimized mirror array is carefully designed to obtain a high duty ratio,which is up to 53.3% at a high power *** using these optimized methods and designs,the passive phase locking of eight Yb-doped fiber amplifiers with ring cavities are obtained,and a pleasing interference pattern with 87% visibility is *** maximum coherent output power of the system is up to 1066 W.

关键词： passive fiber coherent

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色散管理孤子传输特性分析

中国激光 2005年第9期32卷 1193-1196页

作者：杜建新楼祺洪中国科学院上海光学精密机械研究所

色散管理孤子光波系统的色散图周期由具有正负色散值的两段光纤组成,并且在系统中周期性放置集中放大器及滤波器装置。采用变分法获得了描述此种系统性能的常微分方程组,并利用这组方程数值研究了各种参量对孤子传输性能的影响。研究结... 详细信息

色散管理孤子光波系统的色散图周期由具有正负色散值的两段光纤组成,并且在系统中周期性放置集中放大器及滤波器装置。采用变分法获得了描述此种系统性能的常微分方程组,并利用这组方程数值研究了各种参量对孤子传输性能的影响。研究结果表明,虽然从整体趋势上看,当要求色散管理孤子有较好的稳定性时,应适当降低系统的色散管理强度,但在一定条件下,调整光纤放大器的位置以及正负色散光纤的色散差值,可同时获得相对较大的色散管理强度和好的孤子稳定性;总体来讲,集总放大器的位置会对孤子传输的稳定性、色散管理孤子的能量增强因子、脉冲最佳入射位置以及波分复用系统中的信道间的孤子碰撞致定时抖动等系统性能参量产生较明显的影响,可通过优化放大器的位置使系统的性能得到优化。

关键词：光通信色散管理孤子变分法滤波集总放大器能量增强因子

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光纤激光器及其相干组束

红外与激光工程 2007年第2期36卷 155-159页

作者：楼祺洪何兵周军中国科学院上海光学精密机械研究所上海201800

简述了光纤激光器的发展历史,重点介绍了双包层光纤激光器的进展并给出了高功率双包层光纤激光器的最新研究结果。评述了目前国内外高亮度激光的关键技术:光纤激光器的相干组束。介绍了几种典型的相干组束技术并分析了其工作原理。最后... 详细信息

简述了光纤激光器的发展历史,重点介绍了双包层光纤激光器的进展并给出了高功率双包层光纤激光器的最新研究结果。评述了目前国内外高亮度激光的关键技术:光纤激光器的相干组束。介绍了几种典型的相干组束技术并分析了其工作原理。最后给出了相干组束研究的最新结果。

关键词：光纤激光器双包层光纤相干组束

LD侧面抽运Nd:YAG陶瓷激光器运转条件下归一化热参数优化理论及实验研究

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物理学报 2006年第10期55卷 5221-5226页

作者：朱洪涛楼祺洪漆云凤董景星魏运荣中国科学院上海光学精密机械研究所上海201800

考虑激光提取对介质内非辐射跃迁的抑制作用,建立和完善LD侧面抽运Nd:YAG陶瓷激光器运转条件下增益介质的发热模型,通过实验测量激光器斜率效率和增益介质吸收的抽运功率来推导出归一化热参数.通过归一化热参数,讨论了影响Nd:YAG陶瓷介... 详细信息

考虑激光提取对介质内非辐射跃迁的抑制作用,建立和完善LD侧面抽运Nd:YAG陶瓷激光器运转条件下增益介质的发热模型,通过实验测量激光器斜率效率和增益介质吸收的抽运功率来推导出归一化热参数.通过归一化热参数,讨论了影响Nd:YAG陶瓷介质内热沉积的主要因素,研究结果表明:增益介质内热沉积对激光提取效率、交叠效率以及掺杂浓度的变化比较敏感.为有效减少热沉积,对所研究的掺杂原子百分比浓度为1·0%的Nd:YAG陶瓷多模激光器的输出耦合镜进行优化选择,激光提取效率提高到0·905,归一化热参数降低到0·474.研究结果可为进一步研究陶瓷激光器中热效应以及冷却方案设计等提供一定参考.

关键词：热沉积归一化热参数 Nd:YAG陶瓷