High pulse energy and symmetrical far field from an optical parametric oscillator in the red spectral range [PDF]
Journal of the European Optical Society-Rapid Publications, 2011 Red pulses with >30 mJ energy and < 0.6 nm bandwidth have been demonstrated using a type 2 phase matched optical parametric oscillator pumped at 532 nm. A symmetrical signal beam with beam diameter-divergence product of 3 mm·mrad was obtained by applying
Rustad Gunnar, Farsund Øystein
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Simulation Analysis of a Wavefront Reconstruction of a Large Aperture Laser Beam
Sensors, 2023 In order to solve the problem of atmospheric influence on the far-field measurement of the quality of a laser beam, we proposed a direct wavefront measurement system based on the Hartmann detection principle, which can measure large apertures and high ...
Gangyu Wang +4 more
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10 A beam current electron gun design for a high-power electron linac [PDF]
مجله علوم و فنون هستهایThe development of electron beam applications motivates electron gun research. In addition to the beam energy and current, its quality also plays a significant role in the spread of electron guns.
P. Yousefpour Lalemi +4 more
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Monte Carlo-based analysis of the photon beam fluence with air gap thickness between Linac head exit window and patient’s skin in radiotherapy treatments [PDF]
Ядерна фізика та енергетика, 2020 Linear accelerators (Linac) are used in radiation therapy treatment and its technology improvement ensures high dosimetry quality that should be conserved for high radiotherapy efficiency.
Mohamed Bencheikh +2 more
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Effect of aberrations on the beam quality factor of Hermite-Gauss beams
Optics Express, 2023 The effect of aberrations on the beam quality factor ( M 2 ) of Hermite-Gauss (HG) beams is examined. Using the method of moments, we derive closed-form analytical expressions of M 2 due to astigmatism and ...
Nokwazi Mphuthi +2 more
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Dynamic of Grating Thermal Deformation on Beam Quality for Spectral Beam Combining
Frontiers in Physics, 2022 For spectral beam combining, an experimental system of dynamic beam quality caused by the thermal deformation of a grating has been designed and established.
Zhi-feng Deng +4 more
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Automated beam monitoring and diagnosis for CO/sub 2/ lasers
, 2022 S.112-121The usage of a quality management, in combination with a standard certification, is nearly inevitable for todays industrial manufacturing. In laser materials processing, a periodical beam diagnosis is to be executed as a quality-maintaining ...
Böske, L. +4 more
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Beam quality factor of aberrated Laguerre-Gaussian optical beams
Optics Express, 2023 The influence of aberrations on the beam quality factor of Laguerre-Gaussian beams is investigated. We derive analytical expressions for the beam quality factor due to astigmatism and spherical aberration. We show that the width of a Laguerre-Gaussian beam is a significant parameter that determines the aberration effects on the beam quality factor. For
Chemist M. Mabena +4 more
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Do baseline characteristics predict response to treatment for low back pain? Secondary analysis of the UK BEAM dataset [ISRCTN32683578] [PDF]
, 2007 Objectives. To identify characteristics of randomized controlled trial participants which predict greater benefits from physical treatments for low back pain. If successful, this would allow more appropriate selection of patients for different treatments.
Farrin, Amanda +5 more
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Astigmatism-controlled beam shaping for high-quality fibre Bragg grating inscription using femtosecond laser [PDF]
We present an astigmatism-controlled beam-shaping technique for femtosecond laser inscription of FBGs, optimizing beam profiles using a cylindrical lens to mitigate focal distortion and enhance grating quality.
Zhou, Kaiming +4 more
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