Results 21 to 30 of about 7,941,196 (306)

60% Efficient Monolithically Wavelength-Stabilized 970-nm DBR Broad-Area Lasers

open access: yesIEEE Photonics Journal, 2022
Progress in epitaxial design is shown to enable increased optical output power Popt and power conversion efficiency ηE and decreased lateral far-field divergence angle in GaAs-based distributed Bragg reflector (DBR) broad-area (BA) diode lasers ...
Paul Crump   +5 more
doaj   +1 more source

Vector quality measure for vector beams [PDF]

open access: yesSPIE 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

Optical trapping with superfocused high-M2 laser diode beam [PDF]

open access: yes, 2015
Many applications of high-power laser diodes demand tight focusing. This is often not possible due to the multimode nature of semiconductor laser radiation possessing beam propagation parameter M2 values in double-digits.
Kuchinskii, V. I.   +36 more
core   +1 more source

The MICE Muon Beam on ISIS and the beam-line instrumentation of the Muon Ionization Cooling Experiment [PDF]

open access: yes, 2012
The international Muon Ionization Cooling Experiment (MICE), which is under construction at the Rutherford Appleton Laboratory (RAL), will demonstrate the principle of ionization cooling as a technique for the reduction of the phase-space volume occupied
A. Wilson   +826 more
core   +1 more source

BEAM QUALITY MEASUREMENTS IN DIAGNOSTIC ROENTGENOLOGY [PDF]

open access: yesAmerican 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

Interaction time and beam diameter effects on the conduction mode limit [PDF]

open access: yes, 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

Beam Quality of Annular Pulsed Laser Beams Propagating Through the Nonlinear and Dispersive Atmosphere

open access: yesIEEE 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

Ion-beam-assisted fabrication and manipulation of metallic nanowires [PDF]

open access: yes, 2015
Metallic nanowires (NWs) are the key performers for future micro/nanodevices. The controlled manoeuvring and integration of such nanoscale entities are essential requirements.
Verma, H.C.   +6 more
core   +1 more source

Longitudinal beam quality monitoring [PDF]

open access: yes, 2020
Reliable monitoring of the longitudinal beam quality is essential for a safe and effcient operation of any high intensity accelerator. The definition of beam quality criteria vary from one machine to the other, depending on the beam and machine ...
Argyropoulos, T., Argyropoulos, T
core   +1 more source

Optical Field Transmission Analysis of an All-Fiber Signal Combiner With a Dumbbell Shape

open access: yesIEEE 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

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