  A variety of AS2S3 chalcogenide photonic crystal fiber coupler of special
properties are proposed to study the role of birefringence in all optical
coupling characteristics based on the projection operator method (POM). The
equations of motion describing the dynamics of the individual pulse parameters
through x- and y-polarized modes are arrived at by employing POM from the
coupled nonlinear Schr\"odinger equations. From the pulse parameter dynamics,
it is observed that the amplitudes of the polarization components are
significantly influenced by the pulse being introduced with different
polarizing angle even at low input power level. Such a selective polarizing
angles of the input pulse will provide efficient control over the desired
splitting ratio as well as the ability to decide the desired polarization
component.
