Counter-balance of linear and nonlinear optical activity for soliton-like pulses

The problem of temporal soliton propagation in a nonlinear Kerr medium with natural optical activity is considered. The evolution of the state of polarization of the soliton is described using the Stokes parameters. It is shown that due to the balance between the nonlinear optical activity and linear gyrotropy a special class of stationary elliptically polarized solitons appears.