Exact Schrodinger solitons in optical fibers in the presence of space dependent damping or amplification

It is shown that the nonlinear Schrodinger equation describing pulse propag ation in optical fibers in the presence of a properly space-tailored dampin g or amplification is exactly integrable. A simple transformation of variab les is given which transforms the inhomogeneous nonlinear Schrodinger equat ion into the standard form with constant coefficients, thus generating new explicit bright and dark soliton solutions in the cases of anomalous and no rmal dispersion, respectively.