  In a direct detection scheme we observed 7.8 dB of twin-beam squeezing for
multi-mode two-color squeezed vacuum generated via parametric down conversion.
Applying post-selection, we conditionally prepared a sub-Poissonian state of
light containing $6.3\cdot10^5$ photons per pulse on the average with the Fano
factor $0.63\pm0.01$. The scheme can be considered as the heralded preparation
of pulses with the mean energy varying between tens and hundreds of fJ and the
uncertainty considerably below the shot-noise level. Such pulses can be used in
metrology (for instance, for radiometers calibration) as well as for probing
multi-mode nonlinear optical effects.
