  A simple model, based on the analytical formula for the Compton scattering,
is proposed to describe the realistic photon-energy spectra for the Photon
Collider at TESLA. Parameters of the model are obtained from the full
simulation of the beam by V.Telnov, which includes nonlinear corrections and
contributions of higher order processes. Photon energy distribution and
polarization, in the high energy part of the spectra, are well reproduced. Our
model can be used for a Monte Carlo simulation of gamma-gamma events at various
energies and for direct cross-section calculations.
