This letter presents a detailed investigation of how solitons broaden
in the presence of polarization-mode dispersion, For a given amount of
polarization-made dispersion and pulsewidth there exists an optimal c
hoice of group-velocity dispersion, for which solitons are most resist
ant to the effect of polarization-mode dispersion, We also optimize th
e soliton power enhancement factor and find that solitons can propagat
e roughly twice the distance compared to linear pulses in the absence
of group-velocity dispersion.