Results 91 to 100 of about 2,040,617 (301)

Thermal Tuning Of Volume Bragg Gratings For High Power Spectral Beam Combining

, 2010
A tabletop kW-level spectral beam combining (SBC) system using volume Bragg gratings (VBGs) recorded in photothermo- refractive (PTR) glass was presented at the last meeting [1]. Diffraction efficiency of VBGs close to 100% was demonstrated.
Andrusyak, Oleksiy, Drachenberg, Derrek R., Mokhun, Oleksiy, Cohanoschi, Ion, Divliansky, Ivan   +4 more
core   +1 more source

Self‐Cleaning Sensor Surfaces for Long‐Term Environmental Monitoring

Advanced Engineering Materials, EarlyView.
Long‐term use of unattended outdoor sensors without soiling or biofouling is achieved through generation of a micro‐ and nanorough cuvette surface by combing hydrophobic nanoparticles with fluorinated polymers, crosslinked and surface‐attached through CHic chemistry. The coating demonstrates self‐cleaning behavior and prolonged outdoor stability, which
Sanam Kumari Rajak, Yasmina Frey, Ulrike Wallrabe, Oswald Prucker, Jürgen Rühe   +4 more
wiley   +1 more source

Machine learning phase control of filled-aperture coherent beam combining: principle and numerical demonstration

High Power Laser Science and Engineering
Machine learning has already shown promising potential in tiled-aperture coherent beam combining (CBC) to achieve versatile advanced applications. By sampling the spatially separated laser array before the combiner and detuning the optical path delays ...
Hongbing Zhou, Rumao Tao, Xi Feng, Haoyu Zhang, Min Li, Xiong Xin, Yuyang Peng, Honghuan Lin, Jianjun Wang, Lixin Yan, Feng Jing   +10 more
doaj   +1 more source

Power-scalable generation of high-order optical vortices via coherent beam combining [PDF]

APL Photonics
Structured light beams, such as optical vortices carrying orbital angular momentum, are essential for applications ranging from low power optical communications to high-intensity laser–matter interactions.
Hossein Fathi, Rafael F. Barros, Regina Gumenyuk   +2 more
doaj   +1 more source

Beam combining of quantum cascade laser arrays

Optics Express, 2009
Wavelength beam combining was used to co-propagate beams from 28 elements in an array of distributed-feedback quantum cascade lasers (DFB-QCLs). The beam-quality product of the array, defined as the product of near-field spot size and far-field divergence for the entire array, was improved by a factor of 21 by using wavelength beam combining.
Lee, Benjamin, Kansky, Jan, Goyal, Anish K., Pflügl, Christian, Diehl, L, Belkin, Mikhail A., Sanchez, Antonio, Capasso, Federico   +7 more
openaire   +4 more sources

Controlling Grain Growth in Powder Bed Fusion of Yttria‐Stabilized Zirconia Using Femtosecond Lasers: Challenges and Methodological Insights

Advanced Engineering Materials, EarlyView.
Binder‐free laser powder bed fusion of 8YSZ with a femtosecond laser is used to map process windows linking scan strategy, heat accumulation, and grain growth. Time‐resolved thermography and simulations reveal thermal regimes that enable continuous, vitrified, and fine‐grained 8YSZ surface layers without absorptive additives and demonstrate ...
Markus Kühn, Sarah Kaden, Andrea Barz, Daniel Störzner, Jens Bliedtner, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

Dynamic focus shaping with mixed-aperture coherent beam combining

, 2021
A novel concept for dynamic focus shaping based on highly efficient coherent beam combining with microlens arrays (MLA) as combining element is presented.
Aleksander Budnicki (9757301), Daniel Flamm (3942608), Andreas Heimes (9757295), Florian Jansen (3137055), Maike Prossotowicz (9610817), Hans-Jürgen Otto (3957590), Alexander Killi (3970811), Uwe Morgner (3970814)   +7 more
core   +1 more source

High-Power 650 nm Dense Spectral Beam Combining System Based on a Compression Telescope and Imaging Module

Photonics
In this thesis, a 650 nm dense spectral beam combining (DSBC) system based on a compression telescope module (CM) and an imaging module (IM) is proposed (CM&IM DSBC system).
Bingxu Zhao, Lingqian Meng, Man Hu, Xuyan Zhou, Jing Liu, Nihui Zhang, Aiyi Qi, Fu Ting, Weiqiao Zhang, Ao Chen, Wanhua Zheng   +10 more
doaj   +1 more source

Simulation‐Based Analysis of Insert Pull‐Out in Nickel‐Polyurethane Hybrid Foams Using CT‐Derived Geometries

Advanced Engineering Materials, EarlyView.
CT‐based finite element simulations combined with in situ X‐ray computed tomography are used to analyze insert pull‐out in nickel‐coated polymer foams. Despite variations in material parameters, deformation consistently concentrates within a narrow annular region around the insert.
Yannik Bautz, Jonas Fell, Hendrik Jost, Stefan Diebels, Hans‐Georg Herrmann   +4 more
wiley   +1 more source

Optimal Design and Analysis of Wide-Band Near-Infrared Hybrid Dielectric Gratings with High Transmission Efficiency

Micromachines
Since surface relief transmission gratings have very strict requirements on operators and use environment, according to the semiconductor laser external cavity spectral beam combining system, this paper proposes a design scheme for a semiconductor laser ...
Ye Wang, Yongyi Chen, Li Qin, Lijun Wang
doaj   +1 more source