Results 21 to 30 of about 312,210 (236)
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
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Reports on Progress in Physics, 2010 Parallel to advances in laser cooling of atoms and ions in dilute gas phase, which has progressed immensely, resulting in physics Nobel prizes in 1997 and 2001, major progress has recently been made in laser cooling of solids. I compare the physical nature of the laser cooling of atoms and ions with that of the laser cooling of solids.
Galina Nemova, Raman Kashyap
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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
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Laser Cooling to Quantum Degeneracy [PDF]
Physical Review Letters, 2013 We report on Bose-Einstein condensation (BEC) in a gas of strontium atoms, using laser cooling as the only cooling mechanism. The condensate is formed within a sample that is continuously Doppler cooled to below 1\muK on a narrow-linewidth transition. The critical phase-space density for BEC is reached in a central region of the sample, in which atoms ...
Stellmer S. +3 more
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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
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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
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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
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Two-step Doppler cooling of a three-level ladder system with an intermediate metastable level [PDF]
, 2008 Doppler laser cooling of a three-level ladder system using two near-resonant laser fields is analyzed in the case of the intermediate level being metastable while the upper level is short-lived. Analytical as well as numerical results for e.g. obtainable
C. Champenois +7 more
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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
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Magneto-Optical Cooling of Atoms [PDF]
, 2013 We propose an alternative method to laser cooling. Our approach utilizes the extreme brightness of a supersonic atomic beam, and the adiabatic atomic coilgun to slow atoms in the beam or to bring them to rest.
Budker, Dmitry +4 more
core +1 more source