Abstract
AbstractSpatial mode (de)multiplexing of orbital angular momentum (OAM) beams is a promising solution to address future bandwidth issues, but the rapidly increasing divergence with the mode order severely limits the practically addressable number of OAM modes. Here we present a set of multi-vortex geometric beams (MVGBs) as high-dimensional information carriers for free-space optical communication, by virtue of three independent degrees of freedom (DoFs) including central OAM, sub-beam OAM, and coherent-state phase. The novel modal basis set has high divergence degeneracy, and highly consistent propagation behaviors among all spatial modes, capable of increasing the addressable spatial channels by two orders of magnitude than OAM basis as predicted. We experimentally realize the tri-DoF MVGB mode (de)multiplexing and data transmission by the conjugated modulation method, demonstrating lower error rates caused by center offset and coherent background noise, compared with OAM basis. Our work provides a potentially useful basis for the next generation of large-scale dense data communication.
Funder
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Reference58 articles.
1. Kaminow, I. P. et al. A wideband all-optical WDM network. IEEE J. Sel. Areas Commun. 14, 780–799 (1996).
2. Hung, W. et al. An optical network unit for WDM access networks with downstream DPSK and upstream re-modulated OOK data using injection-locked FP laser. In: OFC 2003 Optical Fiber Communications Conference, 2003. 281–282 (IEEE, 2003).
3. Chow, C. W., Wong, C. S. & Tsang, H. K. Optical packet labeling based on simultaneous polarization shift keying and amplitude shift keying. Opt. Lett. 29, 1861–1863 (2004).
4. Mukherjee, B. Optical WDM Networks (Springer, 2006).
5. Willner, A. E. et al. Orbital angular momentum of light for communications. Appl. Phys. Rev. 8, 041312 (2021).
Cited by
69 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献