Ground elements of the space optical communication system

Ground elements of space optical communication system developed under the SILEX program and flight test results.

It is reported that the European Space Agency plans to commission the experiment. the optical communication system between satellites in various orbits ( SILEX project ). Communication equipment is installed onboard the ARTEMIS satellite, which will be launched into geostationary orbit. Tests of communications equipment on board the SPOT 4 satellite in the present time is already being spent. Their preliminary results are presented.

Numerical studies of soliton waves in a nonlinear Bragg reflector.

A method has been developed for numerically analyzing the propagation of soliton waves in a nonlinear Bragg reflector, which takes into account the real parameters of materials. A scheme of the waveguide structure, which may be used, is proposed. used to calculate the switching of solitons.

Dark and gray spatial soliton waves in nonlinear plane waveguides.

The results of the theory are presented. studies of the propagation of dark and gray spatial soliton waves in-plane optical waveguides based on self-defocusing nonlinear media. Given accurate analytical equations.

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Parametric solitons.
The characteristics and structure of multi-frequency (multi-color) parametric solitons are considered. 2 specials identified class of such solitons: cascaded parametric solitons and solitons with a distinguished bandwidth. As an example, the case of the propagation of a five-color parametric soliton with a distinguished bandwidth in a Kerr medium is considered. The results of a study of the stability of these new solitons are presented.