  The generating entangled state by using a 50/50 beamsplitter has been
discussed in the literature before . In this paper we explore how to use an
asymmetric beam-splitter to produce a new kind of entangled state. We construct
such kind of states theoretically and then prove that they make up a complete
and orthonormal representation in two-mode Fock space. Its application in
finding new squeezing operator and new squeezed state is introduced.
