The paper presents an experimental study of the possibility of constructing a near-infrared atmospheric optical communication system based on a pair of 100Base-TX / 1000BASE-T signal format media converters in the 1000BASESX / LX format with DEM-310GT SFP transceivers. To ensure better stability of the input of radiation coming from the receiving collimator into the fiber cable, the FTB900 SN-Y4 BRANCHED TUBE cable was used. Its cable connector has been modified to match the DEM-310GT transceiver. The collimator of the transmitting radiation is supplemented by a spiral phase plate forming a vortex beam. The influence of atmospheric influence on the data transfer rate is analyzed.
The paper considers photo-induced microrelief formation using Gaussian paraxial vortex laser beams with different polarizations and their characteristics, such as the Poynting vector, gradient force and force density, which are important for assessing the effect of radiation on matter. It is shown that the characteristics, which depend only on the intensity gradient, do not allow to correctly describe dependence of the distribution of optical forces and the formed relief. A model taking into account non-gradient forces is presented. Theoretical and experimental results are compared.
This paper describes synthesis, characteristics and experimental observation a new nonlinear optical characteristics new azopolymer based on poly-n-epoxypropyl carbazole (PEPC) and Disperse Orange 3 under the influence of a highintensity laser beam. The regularities in the formation of surface microstructures by the action of a focused Gaussian beam on the film of the synthesized polymer are shown. The dependence of the formation of the microstructure with increasing beam power density is studied. Nonlinear topographic effects arising in the formation of microstructures by beams with linear and circular polarization are described. The anisotropic nanoscale polymer movements were demonstrated for linearly polarized laser beam irradiation.
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