Effect of birefringence on the scattering of the classically entangled beam generated by a common-path technique

Abstract

Spatial-polarization entangled beams can be generated by a coherent superposition of any pair of orthogonal states in polarization and spatial modes. These beams have non-separability between orbital angular momentum and polarization degrees of freedom. In the present work, a common-path technique is proposed to generate a classically entangled beam. The effect of birefringence on the linear entropy of the scattered classically entangled beams is also investigated. The results show that the scattered partially entangled beam is more sensitive to the birefringence than the maximally entangled beam. The results can find applications in secured communication and in optical sensing applications.