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A variety of AS2S3 chalcogenide photonic crystal fiber coupler of specialproperties are proposed to study the role of birefringence in all opticalcoupling characteristics based on the projection operator method (POM). Theequations of motion describing the dynamics of the individual pulse parametersthrough x- and y-polarized modes are arrived at by employing POM from thecoupled nonlinear Schr\"odinger equations. From the pulse parameter dynamics,it is observed that the amplitudes of the polarization components aresignificantly influenced by the pulse being introduced with differentpolarizing angle even at low input power level. Such a selective polarizingangles of the input pulse will provide efficient control over the desiredsplitting ratio as well as the ability to decide the desired polarizationcomponent.

A projection operator approach for computing the dynamics of AS2S3 chalcogenide birefringent photonic crystal fiber coupler