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Evolution of degree of polarization of partially coherent beams propagation in slant and horizontal atmospheric turbulence

  • X. Z. Ke
  • J. WangEmail author
  • M. J. Wang
Original Paper
  • 32 Downloads

Abstract

In this paper, the analytical expressions for the degree of polarization (DoP) of the electromagnetic Gaussian Schell-model (GSM) beam propagating along a slant path in atmospheric turbulence are obtained. The expressions are used to analyze factors such as the waist radius, amplitude ratio, wavelength, and refractive-index structure constant of the polarization properties of the GSM beam, and we come to some new conclusions. The main results that when the components of the waist radius are equal (σx = σy), there is a waist radius within 2 cm < σx < 4 cm that can provide the most concentrated DoP distribution, and the axis point DoP will eventually approach the initial value as the transmission distance increases, implying that it exhibits self-recovering characteristics. In addition, compared to a horizontal path, the DoP distribution of the GSM beam propagating along a slant path is more concentrated, and the propagation distance corresponding to the maximum axis point DoP is longer. Therefore, when the GSM beam propagates along a slant path, the detector can receive information at longer distances. The research results provide a theoretical support for the control of the polarization state of local beam in coherent optical communication systems.

Keywords

Coherent optical communication systems Polarization control Atmospheric turbulence 

PACS Nos.

42.25.Ja 42.25.Kb 42.25.Dd 42.68.Bz 

Notes

Acknowledgements

Project supported by the National Natural Science Foundation of China (NSFC) (61377080, 61771385); Key Industrial Innovation Chain Project of Shaanxi Province (2017ZDCXL-GY-06-01); Xi’an Science and Technology Planning Project (2017080CG/RC043(XALG015)); Natural Science Basic Research Program (2018JQ6032).

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Copyright information

© Indian Association for the Cultivation of Science 2018

Authors and Affiliations

  1. 1.School of Automation and Information EngineeringXi’an University of TechnologyXi’anChina
  2. 2.Faculty of Physics and Telecommunications EngineeringShaanxi University of TechnologyHanzhongChina

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