Results 31 to 40 of about 239,845 (311)
Beam Control in an Intracavity Frequency-Doubling Semiconductor Disk Laser
Applied Sciences, 2019 In this paper, we have demonstrated a 1.3 W green laser using a V-shaped intracavity frequency doubling 1036 nm semiconductor disk laser. The beam quality of the fundamental and second harmonic generation (SHG) laser is investigated.
Guanyu Hou +9 more
doaj +1 more source
BEAM QUALITY MEASUREMENTS IN DIAGNOSTIC ROENTGENOLOGY [PDF]
American Journal of Roentgenology, 1971 Our work to date indicates that the 20th value layer in either aluminum or unit density material can, for one anatomic area of fixed section thickness, be used to predict exposures over a range of kilovoltages[See Figure in the PDF File]using a single type of roentgen-ray unit.
E D, Trout, J P, Kelley
openaire +2 more sources
Vector quality measure for vector beams [PDF]
SPIE Proceedings, 2016 Vector beams are spatial modes of light with spatially variant polarization states in the transverse profile. Over the years, vector beams have found their way into plenty of applications ranging from material processing and lithography to electron acceleration and particle trapping.
Sroor, Hend +4 more
openaire +1 more source
IEEE Photonics Journal, 2021 The Kerr self-focusing and group-velocity dispersion (GVD) effects play important roles when a high-power pulsed laser beam propagates from the ground through the nonlinear and dispersive atmosphere to space orbits.
Yu Deng +5 more
doaj +1 more source
High beam quality 400W practical all-solid-state laser for laser beam texture [PDF]
, 2010 A high-average-power and high-beam-quality diode-side-pumped solid-state laser was designed carefully for laser beam texture. By using of low concentration Nd:YAG crystals with thermally near-unstable resonator design and two-rod birefringence ...
Zhao C +8 more
core +1 more source
Optical Field Transmission Analysis of an All-Fiber Signal Combiner With a Dumbbell Shape
IEEE Photonics Journal, 2022 In this paper, the optical field transmission characteristics of an all-fiber signal combiner with a dumbbell shape and its application in laser beam combining are analyzed theoretically. Based on the three-layer waveguide model, the mode characteristics
Xuanfeng Zhou
doaj +1 more source
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
core +1 more source
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
doaj +1 more source
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
doaj +1 more source
Interaction time and beam diameter effects on the conduction mode limit [PDF]
, 2012 Laser welding has two distinctive modes: keyhole and conduction mode. Keyhole mode is characterized by deep penetration and high welding speeds, while conduction mode has higher quality welds with no defects or spatter.
Assunção, Eurico +2 more
core +1 more source