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检索条件"任意字段=3rd SPIE Conference on Laser System Modeling: Modeling and Simulation of Laser Systems III"

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modeling and simulation system for laser Wireless Power Transmission 3

Modeling and Simulation System for Laser Wireless Power Tran...

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3rd International conference on Electrical, Electronics, and Information Engineering, EEIE 2024

作者： Yang, Yahong Zang, Jiawei Dong, Mengxue Lan, Jianyu State Key Laboratory of Space Power Sources Shanghai Institute of Space Power-Sources Shanghai200245 China

ISBN: (纸本)9781510688179

This paper is aimed at long-distance high-power laser wireless power transmission and researches the theory of laser atmospheric transmission to establish a physical model for calculating the laser power transmission characteristics in different atmospheres, which realizes the quantitative solution of laser power loss and beam quality degradation in the transmission process and simplifies the engineering calculations of laser atmospheric transmission characteristics. Based on the theoretical model, a laser atmospheric transmission simulation system is developed to comprehensively evaluate the laser radiate property and transmission process in complex atmospheric environments, which is of high value for the engineering design and system evaluation of laser wireless power transmission. © The Authors.

关键词： Inductive power transmission

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Third International conference on Electrical, Electronics, and Information Engineering, EEIE 2024

Third International Conference on Electrical, Electronics, a...

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3rd International conference on Electrical, Electronics, and Information Engineering, EEIE 2024

ISBN: (纸本)9781510688179

The proceedings contain 67 papers. The topics discussed include: control method for longitudinal tearing of conveyor belts in coal mines;novel ultra-miniature bandpass filter using both capacitive- and inductive-loaded siw resonators;a modular multilevel converter based on bridge arm multiplexing with efficient converter tributary;optimization design of automotive relay noise based on electric - magnetic - thermal digital model and experiments;design and application of multi-channel focused ultrasound and electrical stimulation device for improving endometrial blood flow;optimized design of chip-breaking geometry of insert for the high-stability indexable insert drill;design and implementation method of automatic bird repellent based on infrared thermal imaging;analysis and experimental research on friction moment of high speed ball bearings for new energy vehicles;discussion on scientific research project management in colleges and universities based on PDCA cycle theory;hierarchical control strategy of interconnected AGC based on BAS-MPC and fractional-order PID;and modeling and simulation system for laser wireless power transmission.

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Analysis of stray light reflected from multi-beam laser focusing surface

Analysis of stray light reflected from multi-beam laser focu...

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conference on Pacific-Rim laser Damage - Optical Materials for High-Power lasers

作者： Jiang, Anqi Guo, Baichen Zhejiang Univ State Key Lab Modern Opt Instrumentat 38 Zheda Rd Hangzhou 310027 Peoples R China

ISBN: (数字)9781510628175

ISBN: (纸本)9781510628175

In the current research of solving the energy problem, the Inertial Confinement Fusion (ICF) has been studied for many years, which drives the occurrence of nuclear reaction in a multi-beam laser focusing system. And in this system, multiple laser beams in different directions are focused at the same surface to produce sufficient light energy. Generally, if the stray light reflected by the focusing surface returns back toward one of the laser systems and then is focused into ghosts with high energy, the optical components near the ghosts will be influenced or damaged. For each laser in the multi-beam laser focusing system, the influence of internal stray light and the effect of stray light generated by other laser need to be considered. Based on the study of the National Ignition Facility (NIF), analysis of stray light reflected from multi-beam laser focusing surface was proposed in this paper. modeling and simulation based on the law of light propagation and Monte Carlo analysis were demonstrated. Ray tracing and the analysis of stray light were carried out in the focusing system. The distribution of stray light on the observation sphere and the optimization rules of array structure were obtained. Finally, we got the optimal structure with d = 2 mm and R = 3 mm, which can better meet the requirements of uniformity and back-to-hole energy.

关键词： ICF multi-beam laser NIF stray light hexagonal array uniformity energy

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simulation of magnetization and levitation characteristics of HTS tape stacks 3

Simulation of magnetization and levitation characteristics o...

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3rd International conference on laser and Plasma Researches and Technologies

作者： Anischenko, I. V. Pokrovskii, S. V. Mineev, N. A. Natl Res Nucl Univ MEPhI Moscow Engn Phys Inst Kashirskoe Sh 31 Moscow 115409 Russia

In this work it is presented a computational model of a magnetic levitation system based on stacks of high-temperature second generation superconducting tapes (HTS) GdBa2Cu3O7-x. Calculated magnetic field and the current distributions in the system for different stacks geometries in the zero-field cooling mode are also presented. The magnetization curves of the stacks in the external field of a permanent NdFeB magnet and the levitation force dependence on the gap between the magnet and the HTS tapes stack were obtained. A model of the magnetic system, oriented to levitation application, is given. Results of modeling were compared with the experimental data.

关键词： Magnetization

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The virtual beamline (VBL) laser simulation code 3

The virtual beamline (VBL) laser simulation code

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3rd Biennial conference on High Power lasers for Fusion Research

作者： Sacks, R. A. McCandless, K. P. Feigenbaum, E. Di Nicola, J. M. G. Luke, K. J. Riedel, W. Learn, R. J. Kraines, B. J. Lawrence Livermore Natl Lab Livermore CA 94550 USA Cornell Univ Ithaca NY USA Apple Inc Cupertino CA USA Florida State Univ Tallahassee FL 32306 USA Rochester Inst Technol Rochester NY 14623 USA

ISBN: (纸本)9781628414356

Design, activation, and operation of large laser systems rely on accurate, efficient, user-friendly simulation of laser performance. At the Lawrence Livermore National Laboratory, the principle tool for this simulation over the past ten years has been the VBL, an outgrowth of the Prop code that uses the same text-file input grammar and is closely integrated with the laser Performance Operations Model (LPOM)(1). Here, we describe the physics capabilities of this code, its user interface, and our plans for near-term future developments.

关键词： laser modeling NIF LPOM physical optics design optimization

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COMBINE: an Integrated Opto-Mechanical Tool for laser Performance modeling 3

COMBINE: an Integrated Opto-Mechanical Tool for Laser Perfor...

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3rd Biennial conference on High Power lasers for Fusion Research

作者： Rehak, M. Di Nicola, J. M. Lawrence Livermore Natl Lab Livermore CA 94550 USA

ISBN: (纸本)9781628414356

Accurate modeling of thermal, mechanical and optical processes is important for achieving reliable, high-performance high energy lasers such as those at the National Ignition Facility [1] (NIF). The need for this capability is even more critical for high average power, high repetition rate applications. modeling the effects of stresses and temperature fields on optical properties allows for optimal design of optical components and more generally of the architecture of the laser system itself. Stresses change the indices of refractions and induce inhomogeneities and anisotropy. We present a modern, integrated analysis tool that efficiently produces reliable results that are used in our laser propagation tools such as VBL [5]. COMBINE is built on and supplants the existing legacy tools developed for the previous generations of lasers at LLNL but also uses commercially available mechanical finite element codes ANSYS or COMSOL (including computational fluid dynamics). The COMBINE code computes birefringence and wave front distortions due to mechanical stresses on lenses and slabs of arbitrary geometry. The stresses calculated typically originate from mounting support, vacuum load, gravity, heat absorption and/or attending cooling. Of particular importance are the depolarization and detuning effects of nonlinear crystals due to thermal loading. Results are given in the form of Jones matrices, depolarization maps and wave front distributions. An incremental evaluation of Jones matrices and ray propagation in a 3D mesh with a stress and temperature field is performed. Wavefront and depolarization maps are available at the optical aperture and at slices within the optical element. The suite is validated, user friendly, supported, documented and amenable to collaborative development. * COMBINE stands for Code for Opto-Mechanical Birefringence Integrated Numerical Evaluations

关键词： ANSYS finite element analysis birefringence photoelasticity polarization eikonal equation wavefront

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The Commissioning of the Advanced Radiographic Capability laser system: Experimental and modeling Results at the Main laser Output 3

The Commissioning of the Advanced Radiographic Capability La...

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3rd Biennial conference on High Power lasers for Fusion Research

作者： Di Nicola, J. M. Yang, S. T. Boley, C. D. Crane, J. K. Heebner, J. E. Spinka, T. M. Arnold, P. Barty, C. P. J. Bowers, M. W. Budge, T. S. Christensen, K. Dawson, J. W. Erbert, G. Feigenbaum, E. Guss, G. Haefner, C. Hermann, M. R. Homoelle, D. Jarboe, J. A. Lawson, J. K. Lowe-Webb, R. McCandless, K. McHale, B. Pelz, L. J. Pham, P. P. Prantil, M. A. Rehak, M. L. Rever, M. A. Rushford, M. C. Sacks, R. A. Shaw, M. Smauley, D. Smith, L. K. Speck, R. Tietbohl, G. Wegner, P. J. Widmayer, C. Lawrence Livermore Natl Lab Livermore CA 94550 USA

ISBN: (纸本)9781628414356

The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory is the first of a kind megajoule-class laser with 192 beams capable of delivering over 1.8 MJ and 500TW of 351nm light [1], [2]. It has been commissioned and operated since 2009 to support a wide range of missions including the study of inertial confinement fusion, high energy density physics, material science, and laboratory astrophysics. In order to advance our understanding, and enable short-pulse multi-frame radiographic experiments of dense cores of cold material, the generation of very hard x-rays above 50 keV is necessary. X-rays with such characteristics can be efficiently generated with high intensity laser pulses above 10(17) W/cm(2) [3]. The Advanced Radiographic Capability (ARC) [4] which is currently being commissioned on the NIF will provide eight, 1 ps to 50 ps, adjustable pulses with up to 1.7 kJ each to create x-ray point sources enabling dynamic, multi-frame x-ray backlighting. This paper will provide an overview of the ARC system and report on the laser performance tests conducted with a stretched-pulse up to the main laser output and their comparison with the results of our laser propagation codes.

关键词： CPA short-pulse petawatt picosecond kilojoule ARC NIF

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Atmospheric limitations on the performance of electro-optical systems: a brief overview 3

Atmospheric limitations on the performance of electro-optica...

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3rd Annual conference on laser Communication and Propagation through the Atmosphere and Oceans

作者： Stein, Karin Gladysz, Szymon Seiffer, Dirk Zepp, Andreas Fraunhofer Inst Optron Syst Technol & Image Explo D-76275 Ettlingen Germany

ISBN: (纸本)9781628412512

Atmospheric effects limit the performance of any electro-optical (EO) system. Tasks such as laser communications or horizontal-path imaging for long-range surveillance are highly affected by environmental effects. In the majority of cases, effects like turbulence impose a fundamental limitation to the capability of EO systems. In this paper, we give an overview of the limiting factors and we will show possibilities for restoration of images degraded by atmosphere.

关键词： imaging through turbulent media atmospheric turbulence atmospheric simulation model adaptive optics

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Current Status and Challenges in Optical Turbulence simulations in Various Layers of the Earth's Atmosphere 3

Current Status and Challenges in Optical Turbulence Simulati...

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3rd Annual conference on laser Communication and Propagation through the Atmosphere and Oceans

作者： He, Ping Nunalee, Christopher G. Basu, Sukanta Vorontsov, Mikhail A. Fiorino, Steven T. North Carolina State Univ Dept Marine Earth & Atmospher Sci Box 8208 Raleigh NC 27695 USA Univ Dayton Sch Engn Intelligent Opt Lab Dayton OH USA Air Force Inst Technol Dept Engn Phys Dayton OH USA

ISBN: (纸本)9781628412512

In this study, we present a brief review on the existing approaches for optical turbulence estimation in various layers of the Earth's atmosphere. The advantages and disadvantages of these approaches are also discussed. An alternative approach, based on mesoscale modeling with parameterized turbulence, is proposed and tested for the simulation of refractive index structure parameter (C-n(2)) in the atmospheric boundary layer. The impacts of a few atmospheric flow phenomena (e.g., low-level jets, island wake vortices, gravity waves) on optical turbulence are discussed. Consideration of diverse geographic settings (e.g., flat terrain, coastal region, ocean islands) makes this study distinct.

关键词： Atmospheric Boundary Layer Mesoscale modeling Optical Turbulence simulation

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modeling of the turbulent phase in strong scintillation conditions 3

Modeling of the turbulent phase in strong scintillation cond...

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3rd Annual conference on laser Communication and Propagation through the Atmosphere and Oceans

作者： Charnotskii, Mikhail Zel Technol LLC Boulder CO 80305 USA

ISBN: (纸本)9781628412512

Monte-Carlo models of the turbulent phase are widely used in the studies of the optical propagation through turbulence atmosphere. However all algorithms, that are currently in use, generate continuous smooth phase samples. Meanwhile, it is well-known that under strong scintillation conditions turbulent phase has singularities, and phase is discontinuous across the branch cuts connecting the singularities. Markov approximation for wave propagation through random inhomogeneous media (1, 2) predicts that under the strong scintillation conditions optical field asymptotically has normal distribution (3). We propose to generate the phase samples under strong scintillation conditions by first producing a complex normal random field with a given coherence function, and then recovering the random phase as the argument of this field. This approach allows generation of the two-dimensional discontinuous random phase samples that include phase singularities. Phase simulation algorithm is based on the Sparse Spectrum concept that was introduced in our earlier works, and can be modified to fit any desired shape of the turbulence spectrum. We verify the accuracy of the phase samples statistics by comparison with the theoretical results presented in the companion paper.

关键词： Turbulence simulation phase screens deep turbulence phase dislocations optical vortices

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