  We address shock waves generated upon the interaction of tilted plane waves
with negative refractive index defect in defocusing media with linear gain and
two-photon absorption. We found that in contrast to conservative media where
one-dimensional dispersive shock waves usually exist only as nonstationary
objects expanding away from defect or generating beam, the competition between
gain and two-photon absorption in dissipative medium results in the formation
of localized stationary dispersive shock waves, whose transverse extent may
considerably exceed that of the refractive index defect. One-dimensional
dispersive shock waves are stable if the defect strength does not exceed
certain critical value.
