  Polarization squeezing is shown to occur in non-degenerate parametric
amplification of coherent light and the degree of squeezing at interaction time
$T$ can be as large as $1-e^{-2T}$. This gives $86.4\%$ polarization squeezing
for $T=1$ and $98.2\%$ for $T=2$. One simple case when this occurs is on taking
initially plane polarized light having equal amplitudes in the two modes that
finally has equal intensities of two circular polarizations. This suggest the
experimental settings of parameters to achieve this extent of polarization
squeezing in coherent light.
