  We investigate the creation of entangled states of bright light beams obeying
the condition of strong Einstein-Podolsky-Rosen-like paradox criterion in
time-modulated quantum dissipative dynamics. Having in view the generation of
these states we propose a non-degenerate optical parametric oscillator(NOPO)
driven by an amplitude-modulated pump field. We develop semi-classical and
quantum theories of this device for all operational regimes concluding that,
contrary to ordinary NOPO, the continuous-variable entanglement becomes
approximately perfect for high level of modulation. Our analytical results are
in well agreement with numerical simulations.
