Results 11 to 20 of about 74,397 (214)
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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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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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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Simulation of laser-Compton cooling of electron beams for future linear colliders
Physical Review Special Topics. Accelerators and Beams, 2001 We study a method of laser-Compton cooling of electron beams for future linear colliders. Using a Monte Carlo code, we evaluate the effects of the laser-electron interaction for transverse cooling. The optics with and without chromatic correction for the
T. Ohgaki, I. Endo
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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
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Optical Pumping of TeH+: Implications for the Search for Varying mp/me
Atoms, 2018 Molecular overtone transitions provide optical frequency transitions sensitive to variation in the proton-to-electron mass ratio ( μ ≡ m p / m e ).
Patrick R. Stollenwerk +4 more
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Photodetachment and Doppler laser cooling of anionic molecules
New Journal of Physics, 2018 We propose to extend laser-cooling techniques, so far only achieved for neutral molecules, to molecular anions. A detailed computational study is performed for ${{\rm{C}}}_{2}^{-}$ molecules stored in Penning traps using GPU based Monte Carlo simulations.
Sebastian Gerber +3 more
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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
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Laser Cooling and Trapping of Rare-Earth-Doped Particles
Applied Sciences, 2022 This review focuses on optical refrigeration with the anti-Stokes fluorescence of rare-earth (RE)-doped low-phonon micro- and nanocrystals. Contrary to bulk samples, where the thermal energy is contained in internal vibrational modes (phonons), the ...
Galina Nemova
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Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms
Scientific Reports, 2018 Laser cooling based on dark states, i.e. states decoupled from light, has proven to be effective to increase the phase-space density of cold trapped atoms.
Sara Rosi +6 more
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