The article presents the results of the formation of a polychromatic edge dislocation. A complex Bragg hologram formed as a complex of two gratings with similar characteristics is used as a device employed for this purpose. It is shown that, under resonant illumination of such a grating in the direction of the zero order, two waves are formed with practically equal intensities, forming a low-frequency interference pattern, at the minima of which edge dislocations are observed. The main idea of the method for the formation of a polychromatic edge dislocation is that such a grating is illuminated by a converging radiation beam with a sufficiently wide spectrum. In this case, the structure itself chooses the resonance angles of illumination of the hologram, and identically localized partial spectral gratings are formed in the zero order. The data of experimental studies are presented. The discussion considered the prospects for the formation of polychromatic azimuthally and radially polarized beams
The transverse energy fluxes (both instantaneous and averaged) arising under the superposition of two quasi-plane waves are considered in this paper. The case of superposition when the frequencies of the interacting beams are different is analyzed. The cases of superposition of coaxial orthogonally (linearly and circularly) polarized waves are considered. The mechanisms of forming the distribution of characteristics of the resulting averaged transverse component of the Poynting vector are established. The data of computer simulation are presented.
The superposition of two plane waves with different frequencies and different polarizations is considered. It is shown that electrical vector moves along complex trajectory, which is similar to the Lissajous figures. The characteristics of possible trajectories are analyzed. The results of computer simulation are presented.
The possibility of formation of the beam with edge dislocation, which is similar to the ТЕ01(10) beam is considered. It is shown that such mode may be obtained due to the diffraction of plane wave on the complex Bragg hologram, constructed as composition of two grating recorded on the same place of registration media. These partial holograms are implemented as the gratings with constant period and close characteristics. The conditions of such operation are formulated. The experimental results are presented.
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