  We determine the cumulants of electromagnetic energy transmitted through
one-dimensional disordered medium with absorption or amplification. For this
purpose we derive the Keldysh nonlinear sigma-model action with a source term
that generates the energy current fluctuations. The fluctuations over the
ensemble of disorder realizations are found to decrease (increase) with
increasing absorption (amplification). In the conservative medium the
fluctuations can be related to the Dorokhov's distribution of transmission
coefficients.
