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High peak power femtosecond cylindrical vector beams generation in a chirped-pulse amplification laser system

Chinese Optics Letters 2022年第3期20卷 52-56页

作者： Zexing Zhao Hao Chen Ziming Zhang jiatong Li Fangxiang Zhu Wei Wan Fei He Huifeng Wei Kangkang Chen Peiguang Yan College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Wuhan Yangtze Soton Laser Photonics Co. Ltd.Wuhan 430205China

Cylindrical vector beams(CVBs),with non-uniform state of polarizations,have become an indispensable tool in many areas of science and ***,little research has explored high power CVBs at the femtosecond *** this paper,we report on tne generation of high quality CVBs with high peak power and femtosecond pulse duration in a fiber chirped-pulse amplification laser *** radially(azimuthally)polarized vector beam has been obtained with a pulse duration of 4A0 fs[430 fs]and a maximum average output power of 20.36 W[20.12 W].The maximum output pulse energy is〜20μJ at a repetition rate of 1 MHz,corresponding to a high peak power of-46 *** comparison between simulated intensity profiles and measured experimental results suggests that the generated CVBs have a remarkable intensity *** proposed configuration of our laser system provides a promising solution for high quality CVBs generation with the characteristics of high peak power,ultrashort pulse duration,and high mode purity.

关键词： femtosecond laser structural beams pulse shaping amplifier

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Rapid fabrication of microrings with complex cross section using annular vortex beams

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Chinese Optics Letters 2022年第2期20卷 187-191页

作者： Chenchu Zhang Hanchang Ye Rui Cao Shengyun Ji Heng Zhang Linhan Zhao Sizhu Wu Hua Zhai Anhui Province Key Laboratory of Aerospace structural Parts Forming Technology and Equipment Institute of Industry and Equipment TechnologyHefei University of TechnologyHefei 230009China Caltech Optical Imaging Laboratory Andrew and Peggy Cherng Department of Medical EngineeringCalifornia Institute of TechnologyPasadenaCA 91125USA Hefei National Laboratory for Physical Sciences at the Microscale and CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Precision Machinery and Precision InstrumentationUniversity of Science and Technology of ChinaHefei 230026China

A ring-shaped focus, such as a focused vortex beam, has played an important role in microfabrication and optical *** shape and diameter of the ring-shaped focus can be easily adjusted by the topological charge of the vortex. However,the flow energy is also related to the topological charge, making the individual control of diameter and flow energy of the vortex beam impossible. Meanwhile, the shape of the focus of the vortex beam remains in the hollow ring. Expanding the shape of focus of structural light broadens the applications of the vortex beam in the field of microfabrication. Here, we proposed a ring-shaped focus with controllable gaps by multiplexing the vortex beam and annular beam. The multiplexed beam has several advantages, such as the diameter and flow energy of the focal point can be individually controlled and are not affected by the zero-order beam, and the gap size and position are controllable.

关键词： microfabrication femtosecond laser structural beams microring

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HIGH GAIN AND HIGH POWER ANTENNA SYSTEMS FOR ADVANCED MULTIFUNCTION MILLIMETER WAVE RADARS

HIGH GAIN AND HIGH POWER ANTENNA SYSTEMS FOR ADVANCED MULTIF...

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1996 CIE International Conference of Radar(ICR’96)

作者： A.A.Tolkachev V.V.Denisenko A.V.Shishlov A.G.Shubov JSC "RADIOPHYZIKA" 10Geroev Panfilovtsev St.P.O.Box 1Moscow 123363RUSSIA

＜正＞Powerful high gain phased antenna arrays of modular structure for millimeter wave（MMW）radars are *** arrays architecture and prognosticated performances are *** ways of achieving a high radiated power are desc... 详细信息

关键词： Millimeter wave radar Radar antennas Phased arrays Antenna arrays Transmission line measurements Beam steering Radar tracking Klystrons structural beams Radar applications

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