Transformation of asymmetric Schell-model beams with a wavefront-folding interferometer

Abstract

We consider a class of random light beams, which are generated by inserting an asymmetric Schell-model beam into a wavefront-folding interferometer. Typical propagation behavior of such optical beams modulated by several legitimate complex coherence states has been investigated. In certain cases, these beams exhibit novel rotationally symmetric intensity patterns with rectangular or lattice-like lobes, and the pattern and location of each lobe can be controlled by adjusting the source coherence parameters. Besides, beam characteristics can be flexibly modulated by varying the phase delay between the two paths of the interferometer. Our results may be applied in free-space optical communication.

Specular transformation of electromagnetic partially coherent beams with a wave-folding interferometer

“…On substituting equation ( 25) first into equation ( 29) and then into equation (28), we could obtain the CSDM elements in the far field. Taking r 1 = r 2 = r, the far-field spectral density has the form…”

“…The CSDM of the field in the far zone could be directly determined by substituting equation ( 33) into equations ( 29) and (28). Then the far-field spectral density and the DOP along the x direction take the forms…”

“…Zhao et al studied theoretically the radiation forces acting on a Rayleigh dielectric sphere of the specular field, and then demonstrated the advantages of the specular beams in particle trapping [26,27]. Tang et al constructed a novel class of specular fields with non-trivial symmetries [28]. Very recently, with the developments in coherence measuring devices, WFIs can be implemented in various ways using prisms, corner-cube reflectors, or arrangements of mirrors to fold the incident beams in one or two dimensions [29].…”