  We investigate polarization squeezing in squeezed coherent states with
varying coherent amplitudes. In contrast to the traditional characterization
based on the full Stokes parameters, we experimentally determine the Stokes
vector of each excitation manifold separately. Only for states with a fixed
photon number do the methods coincide; when the photon number is indefinite,
our approach gives a richer and deeper description. By capitalising on the
properties of the Husimi Q function, we map this notion onto the Poincare
space, providing a full account of the measured squeezing.
