Results 11 to 20 of about 3,715,768 (201)

Flexible and stable optical parametric oscillator based laser system for coherent anti-Stokes Raman scattering microscopy [PDF]

, 2010
The characteristics of a stable and flexible laser system based on a synchronously pumped optical parametric oscillator (OPO) is presented. This OPO can offer very stable operation with both approximately 1 ps and approximately 300 fs outputs over a ...
Parsons, Maddy; id_orcid, Parsons, Maddy, Zhang, Wei, McConnell, Gail   +3 more
core   +4 more sources

Gamma-ray flash in the interaction of a tightly focused single-cycle ultra-intense laser pulse with a solid target

, 2022
We employ the λ3 regime where a near-single-cycle laser pulse is tightly focused, thus providing the highest possible intensity for the minimal energy at a certain laser power.
Valenta, P., Hadjisolomou, P., Ridgers, C.P., 1036450, Kolenaty, D., 1036452, 1036451, V., Olšovcová, 1036454, Versaci, R., 1036453, Bulanov, Sergey, 1036455, 1036447, 1036449, 1036448, Jeong, T.M.   +16 more
core   +1 more source

Possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams [PDF]

, 2012
In laser　cutting　of　thick　steel　sheets,　quality　difference　is　observed　between　cut　surfaces　obtained　with 1 micron and 10 micron laser beams. This paper investigates physical mechanisms for this interesting and important problem of the wavelength ...
Remy Fabbro, Koji Hirano, FABBRO, Rémy, HIRANO, Koji   +3 more
core   +1 more source

Generation of extremely high-intensity tightly focused laser pulse via microstructured plasma target [PDF]

Matter and Radiation at Extremes
Plasma-based optical elements can withstand laser intensities several orders of magnitude higher than traditional optical elements, making them highly promising for manipulating relativistic intensity laser pulses.
Jingyi Wang, Lingyu Zhang, Hao Zhang, Zhidong Chen, Ke Liu, Xinyan Li, Lixiang Hu, Tongpu Yu   +7 more
doaj   +1 more source

Design and fabrication of a mid infra-red photonic crystal defect laser in indium antimonide [PDF]

, 2008
This paper presents 2D FDTD modelling and prototype fabrication of a mid-infrared photonic crystal defect laser.
Rarity, John, Cryan, MJ, Heard, Peter J., Cryan, Martin J, J.R. Pugh, Nash, GR, Rarity, JG, M.J. Cryan, Pugh, JR, P.J. Heard, T. Ashley, Nash, Geoffrey R, G.R. Nash, Heard, PJ, Pugh, Jonathan R., Cryan, Martin J., Ashley, T, Rarity, John G., Heard, Peter J, Nash, Geoff R., Ashley, Tim, Pugh, Jon R, J.G. Rarity   +22 more
core   +1 more source

Visualization of Longitudinal and Transverse Components of Strongly Focused Optical Field by means of Photo-Reactive Azopolymers

EPJ Web of Conferences, 2015
Most important problems in modern photonics are fabrication, visualization and characterization of nanomaterials at optical frequencies. A number of optical techniques uses tightly focused laser beams to access longitudinal electromagnetic fields, which ...
Kharitonov A.V., Kharintsev S.S.
doaj   +1 more source

Modelling Laser Matter Interaction with Tightly Focused Laser Pulses in Electromagnetic Codes [PDF]

, 2016
International audienceWe propose an algorithm to introduce arbitrarily shaped laser pulses into electromagnetic codes. In contrast to the often used paraxial approximation our approach models accurately tightly focused laser pulses and their interaction ...
Stefan Skupin, Rachel Nuter, Illia Thiele, Nuter, Rachel, Skupin, Stefan, Thiele, Illia   +5 more
core   +1 more source

Analysis of hybrid Nd:Yag laser-MAG arc welding processes. [PDF]

, 2011
In the hybrid laser-arc welding process, a laser beam and an electric arc are coupled in order to combine the advantages of both processes: high welding speed, low thermal load and high depth penetration thanks to the laser; less demanding on joint ...
F. Coste, E. Le Guen, P. Le Masson, COSTE, Frédéric, LE MASSON, Philippe, M. Carin, LE GUEN, Emilie, FABBRO, Rémy, CARIN, Muriel, R. Fabbro   +9 more
core   +1 more source

Electron acceleration in vacuum by ultrashort and tightly focused radially polarized laser pulses

EPJ Web of Conferences, 2013
Exact closed-form solutions to Maxwell’s equations are used to investigate electron acceleration driven by radially polarized laser beams in the nonparaxial and ultra-short pulse regime.
Piché Michel, April Alexandre, Marceau Vincent   +2 more
doaj   +1 more source

Capacitive effect in ultrafast laser-induced emission from low conductance diamond nanotips

New Journal of Physics, 2020
Single crystal diamond nanotips reveal a new behavior for ultrafast laser-induced electron emission. Under tightly focused femtosecond laser illumination, electron yield shows a saturation with the laser intensity. When the DC bias is sufficient for dark
Olivier Torresin, Julien Mauchain, Mario Borz, Ivan Blum, Angela Vella, Benoit Chalopin   +5 more
doaj   +1 more source