Results 31 to 40 of about 2,153,493 (386)
Yb:CaGdAlO_4 thin-disk laser [PDF]
Optics Letters, 2011 We present the first demonstration of a Yb:CALGO thin-disk laser. In a slightly multimode configuration, we obtained up to 30 W of average power at a slope efficiency of 40% and an optical-to-optical efficiency of 32%. With a single-mode cavity, an average power of 25 W was achieved.
Ricaud, Sandrine +12 more
openaire +3 more sources
Picosecond thin-disk laser platform PERLA for multi-beam micromachining
, 2021 Multi-beam micro- and nano-machining of material surfaces has been getting more important because of its great potential to increase production speed of large size laser induced periodic surface structures (LIPSS). Fast and cheap production of engineered
M. Smrž +10 more
semanticscholar +1 more source
Optics Express, 2020 We present an ultrafast thin-disk based multipass amplifier operating at a wavelength of 1030 nm, designed for atmospheric research in the framework of the Laser Lightning Rod project. The CPA system delivers a pulse energy of 720 mJ and a pulse duration
C. Herkommer +11 more
semanticscholar +1 more source
Thin accretion disk onto slowly rotating black holes in Einstein-Æther theory [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 The accretion disk is formed by particles moving in closed orbits around a compact object, whose physical properties and the electromagnetic radiation characteristics are determined by the space-time geometry around the compact object.
Chengzhou Liu +3 more
semanticscholar +1 more source
Shadows and optical appearance of black bounces illuminated by a thin accretion disk [PDF]
, 2021 We study the light rings and shadows of an uniparametric family of spherically symmetric geometries interpolating between the Schwarzschild solution, a regular black hole, and a traversable wormhole, and dubbed as black bounces, all of them sharing the ...
Merce Guerrero +3 more
semanticscholar +1 more source
The Panchromatic Hubble Andromeda Treasury. XX. The Disk of M31 is Thick
The Astronomical Journal, 2023 We present a new approach to measuring the thickness of a partially face-on stellar disk, using dust geometry. In a moderately-inclined disk galaxy, the fraction of reddened stars is expected to be 50% everywhere, assuming that dust lies in a thin ...
Julianne J. Dalcanton +8 more
doaj +1 more source
Optics Express, 2014 We present Ytterbium-doped CaF2 as a laser active material with good prospects for high-power operation in thin-disk laser configuration owing to its favorable thermal properties. Thanks to its broad emission bandwidth the material is also suitable for the generation of ultra-short pulses. The properties of the crystal as well as the challenges related
Wentsch, Katrin Sarah +6 more
openaire +3 more sources
Chemical constraints on the formation of the Galactic thick disk
EPJ Web of Conferences, 2012 We highlight some results from our detailed abundance analysis study of 703 kinematically selected F and G dwarf stars in the solar neighbourhood. The analysis is based on spectra of high-resolution (R = 45000 to 110 000) and high signal-to-noise (S/N ...
Feltzing S., Bensby T.
doaj +1 more source
The Chemical Evolution of the Galaxy: the two-infall model [PDF]
, 1996 In this paper we present a new chemical evolution model for the Galaxy which assumes two main infall episodes for the formation of halo-thick disk and thin disk, respectively. We do not try to take into account explicitly the evolution of the halo but we
C. +5 more
core +2 more sources
Stochastic processes, galactic star formation, and chemical evolution. Effects of accretion, stripping, and collisions in multiphase multi-zone models [PDF]
, 2005 This paper reports simulations allowing for stochastic accretion and mass loss within closed and open systems modeled using a previously developed multi-population, multi-zone (halo, thick disk, thin disk) treatment.
Casuso +35 more
core +2 more sources