Results 71 to 80 of about 11,238 (308)

Electrically Tunable Generation of Vector Beams via Integrated Liquid Crystal Plates and Dielectric Metasurface

IEEE Photonics Journal
The generation and modulation of vector beams typically require mechanical adjustments of optical components, leading to a complex setup and long manipulation times.
Ruisi Wang, Kaishuo Zhang, Jing Wei, Wei Zhao   +3 more
doaj   +1 more source

A Knowledge‐Based Approach for Understanding and Managing Additive Manufacturing Data

Advanced Engineering Materials, EarlyView.
Additive manufacturing processes generate a large amount of data. Effectively managing, understanding, and retrieving information from this data remains a major challenge. Therefore, we propose an ontology‐based approach to integrate heterogeneous data, enable semantic queries, and support decision‐making.
Mina Abd Nikooie Pour, Prithwish Tarafder, Anton Wiberg, Huanyu Li, Johan Moverare, Patrick Lambrix   +5 more
wiley   +1 more source

Beam generation and beam shaping for a 1.5 kW diffusion-cooled annular CO2 laser

, 2022
S.66-73A diffusion-cooled CO2-laser with an output power of 1.5 kW was developed and set up with a coaxial RF-excited discharge. The laser beam is extracted by a resonator with helical mirrors, which is stable in the radial direction and unstable in the ...
Habich, U., Poprawe, R., Plum, H.-D., Heursch, A.   +3 more
core  

A Segmented Hybrid Algorithm for Beam Shaping Combining Iterative and Simulated Annealing Approaches

Photonics
In recent years, laser technology has made significant advancements, yet there are specific requirements for the energy concentration and uniformity of lasers in various fields, such as optical communication, laser processing, 3D printing, etc.
Xiaoyu Zhang, Qi Zhang, Genxiang Chen
doaj   +1 more source

Laser requirements for a laser fusion energy power plant

High Power Laser Science and Engineering, 2013
We will review some of the requirements for a laser that would be used with a laser fusion energy power plant, including frequency, spatial beam smoothing, bandwidth, temporal pulse shaping, efficiency, repetition rate, and reliability.
Stephen E. Bodner, Andrew J. Schmitt, John D. Sethian   +2 more
doaj   +1 more source

Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing

Advanced Engineering Materials, EarlyView.
This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu, Xun Zhang, Jack M. Donoghue, Albert D. Smith, Rahul Unnikrishnan, Rhys Thomas, Vahid Nekouie, Jie Luo, Dongchen Hu, Michael Preuss, Philip J. Withers   +10 more
wiley   +1 more source

Free electron laser and microwave instability interplay in a storage ring

Physical Review Special Topics. Accelerators and Beams, 2004
Collective effects, such as the microwave instability, influence the longitudinal dynamics of an electron beam in a storage ring. In a storage ring free electron laser (FEL) they can compete with the induced beam heating and thus be treated as a further ...
G. L. Orlandi, C. Bruni, D. Garzella, M. E. Couprie, C. Thomas, R. Bartolini, C. Rippon, G. Dattoli   +7 more
doaj   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Laser microsculpting for the generation of robust diffractive security markings on the surface of metals

, 2015
We report the development of a laser-based process for the direct writing (‘microsculpting’) of unique security markings (reflective phase holograms) on the surface of metals.
Wlodarczyk, Krystian Lukasz, Hand, Duncan P., Ardron, Marcus, Krystian L. Wlodarczyk, Hand, Duncan Paul; id_orcid, Waddie, Andrew John, Wlodarczyk, Krystian L., Duncan P. Hand, Andrew J. Waddie, Andrew Dunn, Nicholas J. Weston, Matthew D. Kidd, Marcus Ardron, Kidd, Matthew, Waddie, Andrew J., Weston, Nick J., Weston, Nicholas J., Dunn, Andrew, Kidd, Matthew D.   +18 more
core   +1 more source

Simulation of superresolution holography for optical tweezers [PDF]

, 2008
Optical tweezers manipulate microscopic particles using foci of light beams. Their performance is therefore limited by diffraction. Using computer simulations of a model system, we investigate the application of superresolution holography for two ...
Thomson, L.C., Boissel, Yannick, Yao, E., Thomson, Laura C., Yannick Boissel, Eric Yao, Johannes Courtial, Yao, Eric, Laura C Thomson, Courtial, J., Whyte, G., Graeme Whyte, Whyte, Graeme, Courtial, Johannes, Boissel, Y.   +14 more
core   +1 more source