  Conditions to generate high-purity entangled vacuum-evacuated coherent states
($|0>|\alpha>^0 - |-\alpha>^0 |0>$ were studied for two cascade-placed beam
splitters, with one squeezed state input and two coherent state inputs whenever
a single photon is detected. Controlling the amplitudes and the phases of the
beams allows for various amplitudes of the vacuum-evacuated coherent states
($|\alpha>^ 0 = |\alpha> -e^{-|\alpha|^2} |0> $) up to $\alpha = 2.160$ to be
manipulated with high-purity.
