Results 21 to 30 of about 67,245 (314)
Demonstration of a beam loaded nanocoulomb-class laser wakefield accelerator
Nature Communications, 2017 Higher beam quality and stability are desired in laser-plasma accelerators for their applications in compact light sources. Here the authors demonstrate in laser plasma wakefield electron acceleration that the beam loading effect can be employed to ...
J. P. Couperus +14 more
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Laser Beam Machining of Titanium Alloy—A Review
Metals, 2023 This study investigates the laser beam machining mechanism, surface formation mechanisms, heat-affected zone, taper formation, and the dimensional deviation of the titanium alloy, based on the information available in literature.
Alokesh Pramanik, Animesh Kumar Basak
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Characterization of Laser Beam Shaping Optics Based on Their Ablation Geometry of Thin Films
Micromachines, 2014 Thin film ablation with pulsed nanosecond lasers can benefit from the use of beam shaping optics to transform the Gaussian beam profile with a circular footprint into a Top-Hat beam profile with a rectangular footprint.
Stefan Rung +2 more
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High Repetition Rate, TEM00 Mode, Compact Sub-Nanosecond 532 nm Laser
Applied Sciences, 2022 As a critical transmitter, compact 532 nm lasers operating on high repetition and short pulse widths have been used widely for airborne or space-borne laser active remote sensing.
Dongdong Meng +5 more
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Accurate numerical modeling of residual stress fields induced by laser shock peening
AIP Advances, 2018 To improve the accuracy of numerical simulation of laser shock peening, a novel model is developed to predict residual stress distribution. An optical beam measurement system, a white light confocal displacement sensor, and other sensors are used to ...
Boyu Sun, Hongchao Qiao, Jibin Zhao
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Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers
Photonics, 2021 We report the spatial beam self-cleaning in bi-tapered conventional multimode fibers (MMFs) with different tapered lengths. Through the introduction of the bi-tapered structure in MMFs, the input beam with poor beam quality from a high-power fiber laser ...
Xiao-Jun Lin +9 more
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Active nonperturbative stabilization of the laser-plasma-accelerated electron beam source
Physical Review Accelerators and Beams, 2023 Laser plasma accelerators have the ability to produce high-quality electron beams in compact, all-optical-driven configurations, with the electron beams uniquely suited for a wide variety of accelerator-based applications.
Curtis Berger +6 more
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Free-electron laser beam quality [PDF]
IEEE Journal of Quantum Electronics, 1985 Free-electron laser beam quality is defined as the ratio of the current density to the relative axial energy spread. The approach to obtaining high-quality electron beams in some representative accelerators is examined and compared to the beam brightness.
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Nanomaterials, 2022 In this paper, we realize a 3.96 kW all-fiberized and polarization-maintained (PM) amplifier with narrow linewidth and near-diffraction-limited beam quality.
Shuai Ren +7 more
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Laser beam-quality/aperture-shape scaling relation [PDF]
Applied Optics, 1986 Many high-energy lasers (HELs) have noncircular output apertures. Some are rectangular in shape with or without a central or noncentral (up to 30%) obscuration. However, most high-energy laser propagation codes (especially those developed for systems analysis) model the aperture as either an unobscured circle or as a circle with fixed (e.g., 10 ...
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