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| 1 | Enhancing precision in fs-laser material processing by simultaneous spatial and temporal focusing显示文摘In recent years,femtosecond(fs)-lasers have evolved into a versatile tool for high precision micromachining of transparent materials because nonlinear absorption in the focus can result in refractive index modifications or material disruptions.However,when high pulse energies or low numerical apertures are required,nonlinear side effects such as self-focusing,filamentation or white light generation can decrease the modification quality.In this paper,we apply simultaneous spatial and temporal focusing(SSTF)to overcome these limitations.The main advantage of SSTF is that the ultrashort pulse is only formed at the focal plane,thereby confining the intensity distribution strongly to the focal volume and suppressing detrimental nonlinear side effects.Thus,we investigate the optical breakdown within a water cell by pump-probe shadowgraphy,comparing conventional focusing and SSTF under equivalent focusing conditions.The plasma formation is well confined for low pulse energies,2 mJ,but higher pulse energies lead to the filamentation and break-up of the disruptions for conventional focusing,thereby decreasing the modification quality.In contrast,plasma induced by SSTF stays well confined to the focal plane,even for high pulse energies up to 8 mJ,preventing extended filaments,side branches or break-up of the disruptions.Furthermore,while conventional focusing leads to broadband supercontinuum generation,only marginal spectral broadening is observed using SSTF.These experimental findings are in excellent agreement with numerical simulations of the nonlinear pulse propagation and interaction processes.Therefore,SSTF appears to be a powerful tool to control the processing of transparent materials,e.g.,for precise ophthalmic fs-surgery. | Robert Kammel Roland Ackermann Jens Thomas Jorg Gotte Stefan Skupin Andreas Tunnermann Stefan Nolte | 2014 | Light(Science & Applications)2014，3，1： | 11 |
| 2 | 机械活化对铁酸锌浸取行为的影响显示文摘研究了细磨和边磨边浸以及浸取时间和温度对工业锌焙砂和含铁酸锌浸渣浸取行为的影响。试验结果表明,细磨和边磨边浸可加快铁酸锌的浸出速度。在磨矿过程中铁酸锌获得机械活化是浸取行为获得明显改善的主要原因之一。将该技术用于处理含锌热酸浸渣可以改善浸取条件,提高锌的浸出率和增加传统湿法炼锌工艺处理含铁高的锌焙砂的适应能力。 | 李希明 陈家镛 Roland Kammel Franz Pawelk | 1991 | 有色金属1991，43，2： | 5 |
| 3 | APPLICATIN OF ATTRITION GRINDING IN ACID LEACHING OF NICKEL SULFIDE CONCENTRATE显示文摘APPLICATINOFATTRITIONGRINDINGINACIDLEACHINGOFNICKELSULFIDECONCENTRATE①LiXiming,ChenJiayongInstituteofChemicalMetalurgy,TheChi... | Li Ximing, Chen Jiayong Institute of Chemical Metallurgy, The Chinese Academy of Sciences, Beijing 100080 Roland Kammel, Franz Pawlek Institute of Metallurgy, Technical University of Berlin, Strasse des 17 Juni 135, 106 23 Berlin, Germany | 1997 | 中国有色金属学会会刊:英文版1997，7，4： | 2 |
| 4 | Structure of Magnetite Ferrofluids Investigated by Sans with Polarized Neutrons 显示文摘 | Kammel M Hoelt A Wiedenmann A | 2001 | Seripta Mater2001，44，： | 1 |
| 5 | As and Sb leaching from polymetallic sulfide concentrates 显示文摘 | Balaz P Kammel R Villachica C | 2001 | Metall2001，55，4： | 1 |
| 6 | Bed performance in the direct electrowinning of lead from suspension galena anodes 显示文摘 | Paramgurn R K Kammel R | 1998 | Metallurgical Transactions B1998，9，1： | 1 |
| 7 | As and Sb leaching from polymetallic sulfide concentrates显示文摘 | BAL(A)(Z) P KAMMEL R VILLACHICA C | | 0，，： | 1 |
| 8 | Atrial fibrillation: A major comtributor to stroke in the elderly 显示文摘 | Wolf PA Abbott R Kammel WB | 1987 | Arch Iutern Med1987，147，： | 1 |
| 9 | Application of attrition grinding in alkaline leaching of tetrahedrite显示文摘 | Balazp P Sekula F Jakabsky S Kammel R | 1995 | Minerals Engineering1995，8，11： | 1 |
| 10 | New Methods to Produce Electrocatalytic Lead(ⅣV) Dioxide Coatings on Titanium and Stainless Steel显示文摘 | Cifuentes G Cifuentes L Kammel R | | 0，，05： | 1 |
| 11 | Preliminary study of hydrometallurgical refining of MG - silicon with attrition grinding 显示文摘 | S S Lian R Kammel M J Kheiri | 1992 | Solar Energy Materials and Solar Cells1992，26，4： | 1 |
| 12 | Application of attrition grinding in alkaline leaching of tetrahedrite 显示文摘 | BALAZ P SEKULA F JAKABSKY S KAMMEL R | 1995 | MineralsEngineering1995，8，11： | 1 |
| 13 | Thiourea leaching of silver from mechanically activated Tetrahedrite显示文摘 | Balaz P Ficeriova J Sepelak V Kammel R | 1996 | HydrometaUurgy1996，43，13： | 1 |
| 14 | Thiourea leaching of silver from mechanically activated tetrahedrite 显示文摘 | BALAZ P FICERIOVA J SEPELAK V KAMMEL R | 1996 | Hydrometallurgy1996，43，13： | 1 |
| 15 | Atrial fibrillation as an independent risk factor for stroke:the Framingham Study显示文摘 | Wolf PA Abbott RD Kammel WB | 1991 | Stroke1991，22，： | 1 |
| 16 | Oxidizing leaching of sphalerite under atmospheric pressure显示文摘 | Kammel R Pawlek F Simon M | 1987 | Metall1987，41，2： | 1 |
| 17 | Leaching of chalcopyrite concentrate with ferric chloride 显示文摘 | HAVLIK T SKROBIAN M BALAZ P KAMMEL R | 1995 | International Journal of Mineral Processing1995，43，12： | 1 |
| 18 | Deflectometric measurement of specular surface 显示文摘 | Kammel S Leon F P | 2008 | IEEE Transactions on Instrumentation and Measurement(SO018-9456)2008，57，4： | 1 |
| 19 | Neoadjuvant eyelophosphamide in early oonresponsive breast cancer: phase Iil randomized GeparTrio trial显示文摘 | yon Minckwitz G Kammel S Vogel P vinorelbine-eapeeitabine versus el al | 2008 | J Nail Cancer lust2008，100，8： | 1 |
| 20 | Bubble formation from a vertically downward facing nozzle in liquids and molten metals 显示文摘 | Tsuge H Ruedin P Kammel R | 1986 | Journal of Chemical Engineering of Japan1986，19，4： | 1 |
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