  With the aid of the solutions of the Quantum Langevin equations, we have
calculated the Q-functions for the two-mode coherent and subharmonic cavity
light beams. We have then determined the Q-function for the superposed two-mode
coherent and subharmonic cavity light beams. With the help of the pertinent
Q-functions for cavity light beams, we determined the photon statistics,
quadrature statistics, and entanglement. we have obtained that the superposed
two-mode coherent and subharmonic cavity light beams are in a squeezed state
and the squeezing occurs in the plus quadrature. Besides, our analysis shows
that at steady state and at threshold, the superposed two-mode coherent and
subharmonic light beams have a maximum squeezing of $25\%$ below the two-mode
vacuum-state level. We have also clearly shown that the superposed two-mode
light beam is entangled at steady-state and threshold and the entanglement
turned out to be observed in the highly correlated squeezed photons with $75\%$
degree of entanglement.
