We study the temporal dynamics of the polarization state of counterpropagating waves in nonlinear-optical fibers, including the effects of birefringence. In the presence of uniform twist, the dynamics may be reduced to an integrable chiral field representation. The stability analysis reveals the temporally stable polarization configurations or ground states. Polarization switching between these states may occur through domain wall solitons.
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Михайлов et al. (1990) studied this question.