Developing very strong texture in a nickel-based superalloy by selective laser melting with an ultra-high power and flat-top laser beam
Sign Up to like & getrecommendations! Published in 2020 at "Materials Characterization"
DOI: 10.1016/j.matchar.2020.110372
Abstract: Abstract Selective laser melting (SLM) is an important metal additive manufacturing method for manufacturing functional parts with high precision. However, the effective control of texture is very challenging for SLM, due to the use of… read more here.
Keywords: laser; flat top; ultra high; texture ... See more keywords
Experimental study: Underwater propagation of polarized flat top partially coherent laser beams with a varying degree of spatial coherence
Sign Up to like & getrecommendations! Published in 2018 at "Optics Communications"
DOI: 10.1016/j.optcom.2018.04.014
Abstract: Abstract We report on experiments where spatially partially coherent laser beams with flat top intensity profiles were propagated underwater. Two scenarios were explored: still water and mechanically moved entrained salt scatterers. Gaussian, fully spatially coherent… read more here.
Keywords: flat top; laser beams; spatial coherence; coherent laser ... See more keywords
Analytical compensation of harmonics caused by 60° flat‐top modulation
Sign Up to like & getrecommendations! Published in 2019 at "IET Power Electronics"
DOI: 10.1049/iet-pel.2018.5855
Abstract: The 60° Flat-Top PWM modulation method (also called DPWM1, two-phase, or 60° bus-clamp) is widely used by the industry to reduce switching losses in three-phase inverters by connecting one of the three-phase legs to the… read more here.
Keywords: flat top; harmonics; top modulation; analytical compensation ... See more keywords
Stable flat-top solitons and peakons in the PT-symmetric δ-signum potentials and nonlinear media.
Sign Up to like & getrecommendations! Published in 2019 at "Chaos"
DOI: 10.1063/1.5100294
Abstract: We discover that the physically interesting PT-symmetric Dirac delta-function potentials can not only make sure that the non-Hermitian Hamiltonians admit fully-real linear spectra but also support stable peakons (nonlinear modes) in the Kerr nonlinear Schrödinger… read more here.
Keywords: flat top; symmetric signum; stable flat; top solitons ... See more keywords
Optimized inter-element arc spacing and ring radius in the synthesis of phase-only reconfigurable concentric circular array antenna using various evolutionary algorithms
Sign Up to like & getrecommendations! Published in 2020 at "Electromagnetics"
DOI: 10.1080/02726343.2019.1710683
Abstract: ABSTRACT This paper presents a method based on the Moth Flame optimization evolutionary algorithm for the synthesis of Flat-top/pencil beam pair of dual beam reconfigurable concentric circular antenna arrays. This beam pair is generated with… read more here.
Keywords: reconfigurable concentric; optimized inter; inter element; flat top ... See more keywords
Terahertz flat-top broadband defect modes generated in periodically undulated waveguides
Sign Up to like & getrecommendations! Published in 2021 at "Physica Scripta"
DOI: 10.1088/1402-4896/abeeae
Abstract: We propose a tunable flat-top broadband defect mode in the terahertz (THz) frequency range by inserting multiple defects into a periodic waveguide with undulated tube walls. When introducing a defect into periodic structures, we can… read more here.
Keywords: flat top; broadband defect; defect mode; defect ... See more keywords
Two-color flat-top solitons in microresonator-based optical parametric oscillators
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review A"
DOI: 10.1103/physreva.102.013518
Abstract: We studied numerically the generation of the two-color flat-top solitonic pulses, platicons, in the microresonator-based doubly resonant optical parametric oscillator. We revealed that if the signs of the group velocity dispersion (GVD) coefficients at interacting… read more here.
Keywords: flat top; frequency; two color; optical parametric ... See more keywords
Generation of Flat-Top Q-Switched Envelope Dissipative Soliton Resonance Pulse in Passively Mode-Locked Fiber Laser
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2020.2982801
Abstract: We present demonstration of an erbium-doped fiber laser based on the nonlinear amplifying loop mirror mechanism, with a stable phenomenon of flat-top Q-switched mode-locked (FT-QML) dissipative soliton resonance (DSR) pulse, for the first time. In… read more here.
Keywords: flat top; fiber laser; top switched; mode locked ... See more keywords
Multichannel Narrow, Flat-Top Optical Filters Based on Multiple-Phase-Shifted and Phase Sampled FBG
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Journal of Quantum Electronics"
DOI: 10.1109/jqe.2016.2640218
Abstract: All-fiber filters with multiple narrow, flat-top channels are designed and fabricated, by incorporating both the phase sampling technique and multiple $\pi $ phase shifts into a fiber Bragg gratings. The phase sampling yields multiple reflection… read more here.
Keywords: phase; flat top; multichannel narrow; narrow flat ... See more keywords
Sparse Antenna Array With Flat-Top and Sharp Cutoff Radiation Patterns
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2023.3262362
Abstract: A sparse antenna array with flat-top and sharp cutoff radiation patterns is presented in this work. The array consists of 16 antenna elements, which is realized by applying a symmetrical sparse configuration with uniform excitation… read more here.
Keywords: sparse antenna; flat top; array flat; radiation ... See more keywords
Upgrade of the Pulsed Magnetic Field System With Flat-Top at the WHMFC
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Applied Superconductivity"
DOI: 10.1109/tasc.2020.2969108
Abstract: The 65 T pulsed magnetic field with 10 ms flat-top has been achieved at the Wuhan National High Magnetic Field Center (WHMFC). This is an upgrade based on the 41 T with 6 ms flat-top system. Both the magnet… read more here.
Keywords: flat top; field; upgrade; magnetic field ... See more keywords