  Coupled nonlinear Schrodinger equations for paraxial optics with two circular
polarizations of light in a defocusing Kerr medium with anomalous dispersion
coincide in form with the Gross-Pitaevskii equations for a binary Bose-Einstein
condensate (BEC) of cold atoms in the phase separation regime. In this case,
the helical symmetry of an optical waveguide corresponds to rotation of the
transverse potential confining the BEC. The "centrifugal force" considerably
affects the propagation of a light wave in such a system. Numerical experiments
for a waveguide with an elliptical cross sections have revealed characteristic
structures consisting of quantized vortices and domain walls between two
polarizations, which have not been observed earlier in optics.
