  We study localized wave on continuous wave background analytically in a
nonlinear fiber with higher order effects such as higher order dispersion, Kerr
dispersion, and stimulated inelastic scattering. We present an exact rational
W-shaped soliton solutions, whose structural properties depend on the frequency
of the background field. The hump value increase with the decrease of the
background frequency in the certain regime. The highest value of the W-shaped
soliton can be nine times the background's, and the distribution shape is
identical with the one of well-known eyes-shaped rogue wave with its maximum
peak. The numerical stimulations indicate that the W-shaped soliton is stable
with small perturbations.
