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Second harmonic generation of laser beams in transverse mode locking states

Advanced Photonics 2022年第2期4卷 68-77页

作者： Zilong Zhang Yuan Gao Xiangjia Li Xin Wang Suyi Zhao Qiang Liu Changming Zhao Beijing Institute of Technology School of Optics and PhotonicsBeijingChina Ministry of Education Key Laboratory of Photoelectronic Imaging Technology and SystemBeijingChina Ministry of Industry and Information Technology Key Laboratory of Photonics Information TechnologyBeijingChina Arizona State University School for Engineering of MatterTransport and EnergyDepartment of Aerospace and Mechanical EngineeringTempeArizonaUnited States Ministry of Education Key Laboratory of Photonic Control Technology(Tsinghua University)BeijingChina Tsinghua University Department of Precision InstrumentState Key Laboratory of Precision Measurement Technology and InstrumentsBeijingChina

Nonlinear frequency conversion of structured beams has been of great interest *** present an intracavity second harmonic generation(SHG)of laser beams in transverse mode locking(TML)states with a specially designed sandwich such as a microchip *** intracavity nonlinear frequency conversion process of a laser beam in a TML state to its second harmonic is theoretically and experimentally investigated,considering different relative phase and weight parameters between the basic modes in the TML *** between the far-field SHG beam patterns of fundamental frequency transverse modes in coherently locked and incoherently superposed states demonstrates that the SHG of TML beams can carry more *** rarely observed far-field SHG beam patterns are obtained,and they are consistent with the theoretical analysis and numerical *** the obtained SHG beams,the characteristics of the structured fundamental frequency beams can also be conversely investigated or *** work may have important applications in optical 3D printing,optical trapping of particles,and free-space optical communication areas.

关键词： transverse mode locking optical vortex lattice structured beams second harmonic generation

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Optical trapping with structured light: a review

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Advanced Photonics 2021年第3期3卷 4-43页

作者： Yuanjie Yang Yu-Xuan Ren Mingzhou Chen Yoshihiko Arita Carmelo Rosales-Guzmán University of Electronic Science and Technology of China School of PhysicsChengduChina University of Hong Kong Department of Electrical and Electronic EngineeringHong Kong SARChina University of St Andrews SUPASchool of Physics and AstronomySt AndrewsUnited Kingdom Chiba University Molecular Chirality Research CenterChibaJapan Centro de Investigaciones enÓptica A.C.LeónGuanajuatoMexico Harbin University of Science and Technology Wang Da-Heng Collaborative Innovation Center for Quantum Manipulation and ControlHarbinChina

Optical trapping describes the interaction between light and matter to manipulate micro-objects through momentum *** the case of 3D trapping with a single beam,this is termed optical *** tweezers are a powerful and noninvasive tool for manipulating small objects,and have become indispensable in many fields,including physics,biology,soft condensed matter,among *** the early days,optical trapping was typically accomplished with a single Gaussian *** recent years,we have witnessed rapid progress in the use of structured light beams with customized phase,amplitude,and polarization in optical *** beam properties,such as phase singularities on-axis and propagation invariant nature,have opened up novel capabilities to the study of micromanipulation in liquid,air,and *** summarize the recent advances in the field of optical trapping using structured light beams.

关键词： optical trapping structured beams vortex beam optical angular momentum.

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