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<p>We propose the use of a near-perfect Laguerre-Gaussian beam (NPLGB) as the propagating field, which maintains a fixed beam radius not only at the source plane but also throughout the entire propagation process, unaffected by orbital angular momentum (OAM). Furthermore, the beam radius of NPLGB is less influenced by radial index, hence NPLGB exhibits perfect property for both OAM and radial index. To evaluate the transmission performance of NPLGB, we introduced the centroid ring radius (CRR) as a novel evaluation metric and validated its effectiveness. Furthermore, we explore the application of NPLGB in wireless optical communications and assess its performance in atmospheric turbulence. Our results reveal that NPLGB offers significantly improved transmission quality compared to traditional Laguerre-Gaussian beam, with the received signal largely unaffected by OAM modes or radial index. The CRR framework provides a comprehensive explanation for the behavior of NPLGB at the receiving end. In addition, we investigated the effects of turbulence and beam parameters on the received probability of NPLGB, and discussed the influence of the radial index on the total crosstalk probability of NPLGB. The application of NPLGB will significantly advance the objective of utilizing LGB to achieve unrestricted degrees of freedom in wireless optical communications, and offers valuable insights for the development of next-generation vortex beams.</p>

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Optimization of wireless optical communication quality using near-perfect Laguerre-Gaussian beam in the propagating field

  • 期刊论文

  • 发表日期：

    2025年1月11日

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  • Shuailing Wang,
  • Jingping Xu,
  • Yaping Yang,
  • Qian Liu,
  • Mingjian Cheng

摘要

We propose the use of a near-perfect Laguerre-Gaussian beam (NPLGB) as the propagating field, which maintains a fixed beam radius not only at the source plane but also throughout the entire propagation process, unaffected by orbital angular momentum (OAM). Furthermore, the beam radius of NPLGB is less influenced by radial index, hence NPLGB exhibits perfect property for both OAM and radial index. To evaluate the transmission performance of NPLGB, we introduced the centroid ring radius (CRR) as a novel evaluation metric and validated its effectiveness. Furthermore, we explore the application of NPLGB in wireless optical communications and assess its performance in atmospheric turbulence. Our results reveal that NPLGB offers significantly improved transmission quality compared to traditional Laguerre-Gaussian beam, with the received signal largely unaffected by OAM modes or radial index. The CRR framework provides a comprehensive explanation for the behavior of NPLGB at the receiving end. In addition, we investigated the effects of turbulence and beam parameters on the received probability of NPLGB, and discussed the influence of the radial index on the total crosstalk probability of NPLGB. The application of NPLGB will significantly advance the objective of utilizing LGB to achieve unrestricted degrees of freedom in wireless optical communications, and offers valuable insights for the development of next-generation vortex beams.