Results 31 to 40 of about 4,449,071 (303)

Time-Multiplexed Spiking Convolutional Neural Network Based on VCSELs for Unsupervised Image Classification

open access: yesApplied Sciences, 2021
In this work, we present numerical results concerning a multilayer “deep” photonic spiking convolutional neural network, arranged so as to tackle a 2D image classification task.
Menelaos Skontranis   +4 more
doaj   +1 more source

Influence of a pulsed laser regime on surface finish induced by thedirect metal deposition process on a Ti64 alloy [PDF]

open access: yes, 2014
tThe direct metal deposition (DMD) laser technique is a free-form metal deposition process, which allowsgenerating a prototype or small series of near net-shape structures.
GORNY, Cyril   +7 more
core   +1 more source

Ab Initio Simulation of Attosecond Transient Absorption Spectroscopy in Two-Dimensional Materials

open access: yesApplied Sciences, 2018
We extend the first-principles analysis of attosecond transient absorption spectroscopy to two-dimensional materials. As an example of two-dimensional materials, we apply the analysis to monolayer hexagonal boron nitride (h-BN) and compute its transient ...
Shunsuke A. Sato   +3 more
doaj   +1 more source

Locking Phenomena in Semiconductor Lasers near Threshold with Optical Feedback and Sinusoidal Current Modulation

open access: yesApplied Sciences, 2021
The dynamics of semiconductor lasers with optical feedback and current modulation has been extensively studied, and it is, by now, well known that the interplay of modulation and feedback can produce a rich variety of nonlinear phenomena. Near threshold,
Jordi Tiana-Alsina, Cristina Masoller
doaj   +1 more source

Measurement of laser absorptivity for operating parameters characteristic of laser drilling regime [PDF]

open access: yes, 2008
Publisher version : http://iopscience.iop.org/0022-3727/41/15/155502/Laser drilling in the percussion regime is commonly used in the aircraft industry to drill sub-millimetre holes in metallic targets.
SCHNEIDER, Matthieu   +3 more
core   +1 more source

Tailoring the Direct Current Modulation Response of Electrically Pumped Semiconductor Nano-Laser Arrays

open access: yesPhotonics, 2023
Semiconductor nano-lasers have been a topic of interest from the perspective of advancing the capabilities of photonic integration. Nano-lasers are perceived as the means to achieve improved functionality in photonic integrated circuits.
Yuanlong Fan   +3 more
doaj   +1 more source

Dynamics of a Random Laser above Threshold [PDF]

open access: yesPhysical Review Letters, 2001
Physical Review ...
van Soest, G.   +3 more
openaire   +3 more sources

Temperature measurement inside and near the weld pool during laser welding [PDF]

open access: yes, 1999
The work in this article deals with the measurement of temperature fields inside and near the weld pool during laser welding. The laser source used for this study is a 7.5 kW CO2 laser, and the welded material is a UNS N08904 austenitic stainless steel ...
J. Quesada   +9 more
core   +1 more source

Sensing by Dynamics of Lasers with External Optical Feedback: A Review

open access: yesPhotonics, 2022
External optical feedback (EOF) has great impacts on the properties of lasers. It influences the stable operation of lasers. However, various applications based on lasers with EOF have been developed.
Bin Liu, Yangfan Jiang, Haining Ji
doaj   +1 more source

A random laser as a dynamical network

open access: yesNew Journal of Physics, 2014
The mode dynamics of a random laser is investigated in experiment and theory. The laser consists of a ZnCdO/ZnO multiple quantum well with air-holes that provide the necessary feedback. Time-resolved measurements reveal multimode spectra with individually developing features but no variation from shot to shot.
Höfner, M   +2 more
openaire   +4 more sources

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