Results 21 to 30 of about 321,934 (301)
2-kW Average Power CW Phase-Conjugate Solid-State Laser [PDF]
, 2007 We have demonstrated stable operation of a 2-kW Yb:YAG phase-conjugate master oscillator power amplifier (PC-MOPA) laser system with a loop phase-conjugate mirror (LPCM). This is the first demonstration of a continuous wave (CW)-input LPCM MOPA operating
Baltimore, Robert S. +8 more
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High quality beam produced by tightly focused laser driven wakefield accelerators
Physical Review Accelerators and Beams, 2023 We propose to use tightly focused lasers to generate high quality electron beams in laser wakefield accelerators. In this scheme, the expansion of the laser beam after the focal position enlarges the size of wakefield bubble, which reduces the effective ...
Jia Wang +4 more
doaj +1 more source
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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A Pair Polarimeter for Linearly Polarized High Energy Photons [PDF]
, 2004 A high quality beam of linearly polarized photons of several GeV will become available with the coherent bremsstrahlung technique at JLab. We have developed a polarimeter which requires about two meters of the beam line, has an analyzing power of 20% and
Abbott, D. +19 more
core +2 more sources
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
doaj +1 more source
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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Combining Harmonic Generation and Laser Chirping to Achieve High Spectral Density in Compton Sources [PDF]
, 2015 Recently various laser-chirping schemes have been investigated with the goal of reducing or eliminating ponderomotive line broadening in Compton or Thomson scattering occurring at high laser intensities.
Krafft, Geoffrey A. +2 more
core +4 more sources
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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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.
openaire +1 more source