Results 21 to 30 of about 307,922 (287)
Development of laser welding of high strength aluminium alloy 2024-T4 with controlled thermal cycle [PDF]
MATEC Web of Conferences, 2020 An innovative process design, to avoid thermal degradation during autogenous fusion welding of high strength AA 2024-T4 alloy, based on laser beam welding, is being developed. A series of instrumented laser welds in 2 mm thick AA 2024-T4 alloys were made
Demirorer Mete +4 more
doaj +1 more source
A rate equation approach to cavity mediated laser cooling [PDF]
, 2012 The cooling rate for cavity mediated laser cooling scales as the Lamb-Dicke parameter eta squared. A proper analysis of the cooling process hence needs to take terms up to eta^2 in the system dynamics into account.
A. Perelomov +4 more
core +2 more sources
IEEE Photonics Journal, 2021 Mode instability (MI) has become a major factor that restricts the brightness enhancement of fiber laser. This paper studies the MI threshold characteristics of the fiber oscillators with refrigerated ytterbium-doped fiber (YDF).
Jinming Wu +9 more
doaj +1 more source
Towards redistribution laser cooling of molecular gases: Production of candidate molecules SrH by laser ablation [PDF]
, 2013 Laser cooling by collisional redistribution of radiation has been successfully applied in the past for cooling dense atomic gases. Here we report on progress of work aiming at the demonstration of redistribution laser cooling in a molecular gas.
Moroshkin, Peter +4 more
core +1 more source
SYMPATHETIC COOLING OF LITHIUM BY LASER-COOLED CESIUM [PDF]
Laser Spectroscopy, 2002 We present first indications of sympathetic cooling between two neutral, optically trapped atomic species. Lithium and cesium atoms are simultaneously stored in an optical dipole trap formed by the focus of a CO$_2$ laser, and allowed to interact for a given period of time. The temperature of the lithium gas is found to decrease when in thermal contact
Kraft, S. +5 more
openaire +3 more sources
New Journal of Physics, 2013 Laser cooling of molecules employing broadband optical pumping involves a timescale separation between laser excitation and spontaneous emission. Here, we optimize the optical pumping step using shaped laser pulses. We derive two optimization functionals
Daniel M Reich, Christiane P Koch
doaj +1 more source
Zeitschrift für Naturforschung A, 1975 Abstract Wavelength spectrum, threshold intensity, photobleaching and long pulse emission in cooled dye matrices (rhodamin B, rhodamin 6 G, cresylviolet) as a function of temperature (+ 25 °C to - 140 °C) was investigated. Absorption spectra were also obtained.
Ch. Heinsohn, J. Weber
openaire +1 more source
The Effects of Laser Surface Modification on the Microstructure of 1.4550 Stainless Steel
MATEC Web of Conferences, 2018 In this study a stainless austenitic steel 1.4550 was laser heat treated with diode laser. The influence a gouache coating on remelted steel substrate was carry out. The cooling system during laser melted was analysis as well.
Przestacki Damian +3 more
doaj +1 more source
Cavity cooling of free silicon nanoparticles in high-vacuum [PDF]
, 2013 Laser cooling has given a boost to atomic physics throughout the last thirty years since it allows one to prepare atoms in motional states which can only be described by quantum mechanics.
Arndt, Markus +4 more
core +2 more sources
Robust polarization gradient cooling of trapped ions
New Journal of Physics, 2022 We implement three-dimensional polarization gradient cooling (PGC) of trapped ions. Counter-propagating laser beams near 393 nm impinge in lin ⊥ lin configuration, at a frequency below the S _1/2 to P _3/2 resonance in ^40 Ca ^+ .
Wenbing Li +5 more
doaj +1 more source