Formation of the spatial structure of radiation in solid-state laser systems by apodizing and hard apertures

Abstract

We study equations of a non-gauge vector field in a spherically symmetric static metric. The constant vector field with a scale arrangement of components, the temporal component about the Planck mass m Pl and the radial component about M suppressed with respect to the Planck mass, serves as a source of metric reproducing flat rotation curves in dark halos of spiral galaxies, so that the velocity of rotation v 0 is determined by the hierarchy of scales: √ 2v 2 0 = M/m Pl , and M ∼ 10 12 GeV. A natural estimate of Milgrom's acceleration about the Hubble rate is obtained. PACS numbers: 04.40.−b, 95.35.+d, 04.40.Nr, 98.62.Gq 1 An example of an alternative description due to a modification of gravity is given in [15].

eXawatt Center for Extreme Light Studies

“…To avoid diffraction at the edges of ‘cut’ beams, either soft diaphragms are used, similar to those described in Refs. [71,72], or mirrors with an inhomogeneous reflection coefficient, or toothed diaphragms [ 73 , 74 ] . The pulse energy density is about 2 J/cm 2 , which makes it possible to use such diaphragms [ 74 ] .…”

“…Input pulse energy, J 132/54/64 b DKDP thickness, cm 3.8/4.3/4.3 b Input beam diameter, cm 27 Pump beam area, cm 2 25 × 25 Pump energy in input beam diameter, J 3250 Full pump energy, J 3900 OPCPA efficiency a 0.32 Beam area at outputs 4.1-4.12, cm 2 5 × 5 Beam energy a at outputs 4.1-4.12, J 50 of 'cut' beams, either soft diaphragms are used, similar to those described in Refs. [71,72], or mirrors with an inhomogeneous reflection coefficient, or toothed diaphragms [73,74] . The pulse energy density is about 2 J/cm 2 , which makes it possible to use such diaphragms [74] .…”

Spatial filters for high-peak-power multistage laser amplifiers

“…Transport telescopes in these lasers are required to match the beam diameter with the amplifier apertures [5]. In addition, they relay images of successive planes passing through active elements (AEs) of the amplifiers, thereby lowering the beam intensity variations in the AEs [13]. Pinholes in the focal plane of the telescope lenses decrease the angle of view of the amplifiers to prevent parasitic lasing caused by parasitic reflections from various elements, lower the level of amplified spontaneous emission [14], and suppress small-scale self-focusing [15].…”