OAM-based physical-layer security enabled by hybrid free-space optical-Terahertz technology

Ivan B. Djordjevic, Shaoliang Zhang, Ting Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

In order to address security issues of optical networks, quantum key distribution (QKD) has been proposed. However, most of the research efforts in QKD are based on a spin angular momentum (also known as a photon polarization), which represents a fragile source of quantum information for transmission over single-mode fiber (SMF), so that the secure key rates are very low, and at the same time the transmission distance is limited. In this paper, we follow a different strategy. The orbital angular momentum (OAM) modes, which are related to the azimuthal dependence of the wavefront, are orthogonal among others so that this additional degree-of-freedom can be used to improve the physical-layer security (PLS) in both wireless and optical networks. Spatial light modulators (SLMs) are routinely used to generate OAM modes in optical domain, in particular in free-space optical (FSO) communications. On the other hand, it has been recently demonstrated that a traveling-wave circular loop antenna, with azimuthal phase distribution along the loop, can be used to generate OAM in the RF domain. Reliability of FSO links is affected by atmospheric turbulence effects, scattering effects, and low-visibility in foggy conditions. On the other hand, RF technologies are not affected by these effects, but are sensitive to rain and snow. In particular, THz technologies, have available bandwidths comparable to a typical wavelength channel in WDM systems. Based on this complementarity, here we propose to use hybrid FSO-THz technologies to significantly improve the PLS of either FSO or wireless communications.

Original languageEnglish (US)
Title of host publication2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications, TELSIKS 2017 - Proceeding
EditorsBratislav D. Milovanovic, Nebojsa S. Doncov, Zoran Z. Stankovic, Tijana Z. Dimitrijevic
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages317-320
Number of pages4
ISBN (Electronic)9781538618004
DOIs
StatePublished - Jun 28 2017
Event13th International Conference on Advanced Technologies, Systems and Services in Telecommunications, TELSIKS 2017 - Nis, Serbia
Duration: Oct 18 2017Oct 20 2017

Publication series

Name2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications, TELSIKS 2017 - Proceeding
Volume2017-October

Other

Other13th International Conference on Advanced Technologies, Systems and Services in Telecommunications, TELSIKS 2017
CountrySerbia
CityNis
Period10/18/1710/20/17

Keywords

  • Atmospheric turbulence
  • Free-space optical (FSO) links
  • Hybrid FSO-Terahertz technology
  • Multipath fading
  • Orbital angular momentum (OAM)
  • Physical-layer security (PLS)

ASJC Scopus subject areas

  • Computer Science Applications
  • Hardware and Architecture
  • Signal Processing
  • Computer Networks and Communications
  • Safety, Risk, Reliability and Quality

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  • Cite this

    Djordjevic, I. B., Zhang, S., & Wang, T. (2017). OAM-based physical-layer security enabled by hybrid free-space optical-Terahertz technology. In B. D. Milovanovic, N. S. Doncov, Z. Z. Stankovic, & T. Z. Dimitrijevic (Eds.), 2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications, TELSIKS 2017 - Proceeding (pp. 317-320). (2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications, TELSIKS 2017 - Proceeding; Vol. 2017-October). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/TELSKS.2017.8246287