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激光二极管端面抽运Nd∶YVO_4晶体连续输出板条激光器研究

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物理学报 2008年第11期57卷 6982-6986页

作者：张恒利闫莹杜克明北京理工大学信息科学与技术学院 EdgeWave gmbh Steinbachstr.1552074 AachenGermany

报道了利用激光二极管列阵端面抽运Nd∶YVO4混合腔板条激光器连续波输出的实验结果,获得近衍射极限的60 W连续激光输出.实验证明两种晶体输出功率相当,低掺杂浓度的Nd∶YVO4晶体更有利于得到近衍射极限的高功率输出,但同时对冷却水温度... 详细信息

报道了利用激光二极管列阵端面抽运Nd∶YVO4混合腔板条激光器连续波输出的实验结果,获得近衍射极限的60 W连续激光输出.实验证明两种晶体输出功率相当,低掺杂浓度的Nd∶YVO4晶体更有利于得到近衍射极限的高功率输出,但同时对冷却水温度的变化也较敏感.

关键词：激光二极管端面抽运板条激光器混合腔

Innovative laser-based Manufacturing Concepts and Equipment for Efficient Steel Processing

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Innovative Laser-based Manufacturing Concepts and Equipment ...

Analyzing laser-Welded NiTi-NiTi-Joints for Actuator Applications Using Design of Experiments

第八届（2011）中国钢铁年会

作者： Spttl Marius Mohrbacher Hardy ThyssenK rupp lasertechnik gmbh RavensburgGermany NiobelC on bvba SchildeBelgium

laser welding has seen countless applications over the last two decades due to its attractive properties such as low heat input, high precision and speed as well as versatile and automatic handling. The exploitation of the full application potential of laser welding requires an appropriate manufacturing concept and the corresponding technology. The integration of laser welding（and cutting） into larger manufacturing processes or into stand-alone systems will be demonstrated using examples of ThyssenK rupp lasertechnik’s experience of over 20 years in this field. More specifically the modular setup of such manufacturing concepts and the different level of automation will be indicated to offer individual solutions for different needs and budgets of small ＆ medium sized as well as large enterprises. The demonstrated applications range from flat sheet, profiles, tubes to rods made from carbon steel or stainless steel.

关键词： laser welding laser cutting coil welding tailored blanks tailored orbitals

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Journal of Mechanics Engineering and Automation 2015年第2期5卷 76-81页

作者： Dennis Otibar Christian Rathmann Konstantin Lygin Dieter Kreimeier Peter Szymansky Faculty of Mechanical Engineering Ruhr-University Boehum Bochum 44801 Germany PSL Technik gmbh Oberhausen 46149 Germany

One promising joining method for NiTi-SMA （shape memory alloy）-components is laser welding. This joining technology bears huge potential regarding process automation and mechanical properties as well as durability, especially within the field of small- and medium-sized actuators. However, there is still need for research due to unsolved issues influencing the microstructure and thus effecting mechanical properties as well as SMA-characteristics of these joints. Therefore, the purpose of this paper is the evaluation of quality parameters of NiTi-NiTi-wire-joints. For this purpose, design of experiments with a fractional factorial design is used for the investigation, because of its high potential to decrease experimental effort. This paper provides a basis for future research in the field of SMA-actuators and joining.

关键词： SMA shape memory actuators NiTi-NiTi-joints laser welding joining design of experiments.

Group-delay Dispersion in Double-prism Pair and Limitation in Broadband laser Pulses

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Chinese Journal of lasers 2002年第5期11卷 40-44页

作者：程昭赵卫 Femtolasers Productions gmbh A -1040 Wien 奥地利 Xi'an Institute of Optics and Precision Mechanics The Chinese Academy of Sciences State Key Lab . of Transient Optics TechnologyCAS Xi'an 710068

A general expression of group delay dispersion is obtained without any approximation for a pair of double prisms with an arbitrary apex angle. This expression also includes the change of dispersion resulting from change in insertion of the prism material into the beam by translating prism-pairs. The high order dispersion can be calculated by means of this expression. The limitation for generation of negative group delay dispersion by use of prism pairs is presented for ultrashort laser pulses with broadband spectrum.

关键词： group delay dispersion prism pair compressor ultrashort laser pulses

Effects of inter-layer remelting frequency on the microstructure evolution and mechanical properties of equimolar CoCrFeNiMn high entropy alloys during in-situ powder-bed arc additive manufacturing(PBAAM)process

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Journal of Materials Science & Technology 2022年第18期113卷 90-104页

作者： Jun Wang Yao Lu Fanghui Jia Wenzhen Xia Fei Lin Jian Han Ruichao Wang Zengxi Pan Huijun Li Zhengyi Jiang School of Mechanical Materials Mechatronic and Biomedical EngineeringUniversity of WollongongWollongongNew South Wales 2522Australia School of Metallurgical Engineering Anhui University of TechnologyMaanshan 243000China Department of Structure and Nano-/Micromechanics of Materials Max-Planck-Institut für Eisenforschung GmbHDüsseldorf 40237Germany Faculty of Intelligent Manufacturing Wuyi UniversityGuangdong 529020China

An equiatomic CoCrFeNiMn High Entropy Alloy(HEA)was in-situ deposited by the powder-bed arc ad-ditive manufacturing(PBAAM)process for the first *** research was conducted on the evolution of phase,crystallographic orientation,dislocation morphology,precipitation,and mechanical performance with the accumulation of inter-layer remelting *** experimental outcomes mani-fested that the PBAAMed CoCrFeNiMn HEA consists of a stable solid-solution FCC structure,with de-creased lattice parameter but slightly increased(full width at half maximum)FWHM as the accumulation of the inter-layer ***{001}cube texture with a weakened texture intensity was de-tected with an increment of inter-layer remelting frequency from once to 5 times,yet it was transformed into{011}Goss texture with a further increase to 7 ***,the mean grain diameter distinctly decreased,while the volume fraction of(low angle grain boundaries)LAGBs and dislocation density remarkably added up as the accumulated inter-layer *** cellular substructure generated in all process conditions and could be easily differentiated by elemental *** theσand M 23 C 6 Cr-rich precipitates in nano-scale and submicron MnS precipitate were detected on the grain boundaries of the PBAAMed deposited components,with a rather sparse *** of mechanical performance,the YS,UTS,and hardening rate are generally increased while the UE is grad-ually decreased as increased inter-layer remelting *** studied PBAAMed CoCrFeNiMn HEA pos-sesses comparable mechanical performances with the counterparts of laser-deposited and as-cast *** strengthening mechanisms of the studied material are predominantly the grain boundary strength-ening and dislocation *** investigation would be a valuable resource in the research field of fabricating HEA alloys with acceptable microstructure and properties using the PBAAM method.

关键词： CoCrFeNiMn HEA Powder-bed arc additive manufacturing (PBAAM) Microstructure Phase Mechanical properties

高重复率电光调Q的高光束质量Nd∶YVO_4板条激光器

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光学学报 2004年第5期24卷 641-644页

作者：石鹏张恒利汪永东 Robert Diart 杜可明中国科学院上海光学精密机械研究所 EdgeWave gmbh Steinbachstr. 15 D-52074 Aachen Germany

部分端面抽运混合腔板条激光器可以在紧凑的空间内实现大功率高光束质量的激光输出。利用这一技术并结合具有增益高、荧光寿命短等特点的Nd∶YVO4晶体 ,配合新型高重复率的电光Q开关 ,易于实现高频窄脉冲高光束质量的激光输出。在德国Ed... 详细信息

部分端面抽运混合腔板条激光器可以在紧凑的空间内实现大功率高光束质量的激光输出。利用这一技术并结合具有增益高、荧光寿命短等特点的Nd∶YVO4晶体 ,配合新型高重复率的电光Q开关 ,易于实现高频窄脉冲高光束质量的激光输出。在德国EdgeWavegmbh进行了混合腔电光调Q激光器的合作研究中 ,实现了高重复率近衍射极限的输出 ;在以 5kHz的高重复率运转时 ,获得了单脉冲能量 7 2mJ ,脉宽 5 7ns,平均功率约 36W的脉冲 ;当重复率高达 5 0kHz时 ,输出的激光脉冲的参量是单脉冲能量 1.6mJ,脉宽 9 5ns,平均功率超过 80W。实验所测的光束质量因子M2 小于 2。

关键词：应用光学半导体抽运固体激光器电比悯Q 扳条激光器光束质量钕掺杂钒酸钇晶体

可去除染料--N-聚糖多方法深入分析中的缺失环节

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Engineering 2023年第7期26卷 132-150,I0006页

作者： Samanta Cajic RenéHennig Valerian Grote Udo Reichl Erdmann Rapp Max Planck Institute for Dynamics of Complex Technical Systems Magdeburg 39106Germany glyXera gmbh Magdeburg 39120Germany Otto-von-Guericke University Chair of Bioprocess EngineeringMagdeburg 39106Germany

As the roles of glycans in health and disease continue to be unraveled,it is becoming apparent that glycans’immense complexity cannot be *** fully delineate glycan structures,we developed an integrative approach combining a set of cost-effective,widespread,and easy-to-handle analytical *** key feature of our workflow is the exploitation of a removable fluorescent label—exemplified by 9-fluorenylmethyl chloroformate(Fmoc)—to bridge the gap between diverse glycoanalytical methods,especially multiplexed capillary gel electrophoresis with laser-induced fluorescence detection(xCGELIF)and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry(MALDI-TOFMS).Through the detailed structural analysis of selected,dauntingly complex N-glycans from chicken ovalbumin,horse serum,and bovine transferrin,we illustrate the capabilities of the presented ***,this approach“visualizes”N-glycans that have been difficult to identify thus far—such as the sulfated glycans on human immunoglobulin A—including minute changes in glycan structures,potentially providing useful new targets for biomarker discovery.

关键词： Glycoproteins N-glycans Reversible labeling Hydrophilic interaction liquid chromatography Capillary gel electrophoresis Mass spectrometry

Ultraviolet laser Based Gas Phase Fluorination of Polystyrene

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Journal of Surface Engineered Materials and Advanced Technology 2014年第5期4卷 309-317页

作者： Simon Kibben Klaus Vogelsang BIAS—Bremer Institut für angewandte Strahltechnik gmbh Bremen Germany INNOVENT e.V. Jena Germany

A novel hybrid process for surface fluorination of polymers is being introduced. The process is based on ultra violet (UV) laser radiation, which on the one hand forms radicals out of an atmosphere of a partially fluorinated benzene, and on the other hand activates a polymer surface in the areas where the UV radiation hits the surface. The radicals can react with the polymer surface, hence altering the surface energy. With this process, a fluorine content of over 30% on the surface of bulk polystyrene can be achieved, while the smallest possible structure size was smaller than 1 mm.

关键词： UV-laser Polymer Modification Local Fluorination

半导体直接泵浦钛宝石超快激光振荡器驱动的自旋太赫兹发射光谱系统(特邀)

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光学学报 2024年第17期44卷 346-356页

作者：杜琳李培炎黄滋宇杨明吴晓君北京航空航天大学电子信息工程学院北京100191 VIULASE gmbh 奥地利维也纳1230

率先采用半导体直接泵浦的小型化钛宝石飞秒激光振荡器驱动太赫兹(THz)光谱系统,并在无外磁场条件下实现反铁磁|铁磁|重金属(IrMn_(3)|Co_(20)Fe_(60)B_(20)|W)异质结中THz信号的高效产生。通过研究样品方位角、入射面、外加面内磁场、... 详细信息

率先采用半导体直接泵浦的小型化钛宝石飞秒激光振荡器驱动太赫兹(THz)光谱系统,并在无外磁场条件下实现反铁磁|铁磁|重金属(IrMn_(3)|Co_(20)Fe_(60)B_(20)|W)异质结中THz信号的高效产生。通过研究样品方位角、入射面、外加面内磁场、泵浦功率以及泵浦激光光斑中心位置对THz信号发射性能的影响,验证其自旋THz辐射机理,并发现该异质结不是在聚焦透镜焦点处产生THz信号的效率最高,而是在焦点前的辐射信号更强。这项工作不仅验证了半导体直接泵浦的小型化、低成本钛宝石激光振荡器是直接应用于自旋THz发射光谱系统的首选,还率先发现无外磁场驱动的IrMn_(3)|Co_(20)Fe_(60)B_(20)|W异质结在超短激光脉冲泵浦下的异常行为,为进一步推动钛宝石飞秒激光器驱动的小型化超宽带THz时域光谱成像技术应用提供了数据支撑。

关键词：超快光学半导体直接泵浦钛宝石激光器自旋THz发射 THz时域光谱技术反铁磁|铁磁|重金属异质结