  We presented a new method for measuring the squares of the amplitudes and
phases of partial vortex-beams in a complex beam array in real time. The method
is based on measuring the high-order intensity moments and analyzing the
solutions of a system of linear equations. Calibration measurements have shown
that the measurement error at least for an array of 10-15 beams does not exceed
4%. When measuring beams with different fractional topological charge of
optical vortices, we revealed a sharp decrease in the OAM for small deviations
of the topological charge from the integer order which is associated with a
sharp increase in the number of integer-order vortices. The application of this
approach e.g. for the terabit-information processing in optical fibers provides
significant advantages in comparison with the traditional diffraction methods
and opens up additional possibilities of information compressor when modulating
not only the OAM but also phases of partial beams.
