Approaching terabit optical transmission over strong atmospheric turbulence channels

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

5 Scopus citations

Abstract

In this invited paper, we experimentally demonstrate high spectral efficiency and large capacity featured free-space optical (FSO) transmission system by using LDPC coded quadrature phase shift keying (QPSK) combined with orbital angular momentum (OAM) multiplexing. The strong atmospheric turbulence channel is emulated by two spatial light modulators on which four randomly generated azimuthal phase patterns from Andrews' spectral density are recorded. The validity of such approach is verified by reproducing the intensity distribution and irradiance correlation function (ICF) from the full-scale simulator. Excellent agreement of experimental, numerical, and analytical results is found. To reduce the azimuthal phase distortion induced by the turbulence emulator, the inexpensive wavefront sensorless adaptive optics (AO) is used. To deal with remaining channel impairments a properly designed large-girth low-density parity-check (LDPC) code is used. To further improve the aggregate data rate, the OAM multiplexing is combined with DWDM and 500 Gb/s optical transmission over the strong atmospheric turbulence channels is demonstrated. By employing both polarization states and frequency-locked lasers, beyond 1 Tb/s serial optical transmission over strong atmospheric turbulence channel can be achieved with the proposed FSO scheme.

Original languageEnglish (US)
Title of host publication2016 18th International Conference on Transparent Optical Networks, ICTON 2016
PublisherIEEE Computer Society
Volume2016-August
ISBN (Electronic)9781509014675
DOIs
StatePublished - Aug 23 2016
Event18th International Conference on Transparent Optical Networks, ICTON 2016 - Trento, Italy
Duration: Jul 10 2016Jul 14 2016

Other

Other18th International Conference on Transparent Optical Networks, ICTON 2016
CountryItaly
CityTrento
Period7/10/167/14/16

Keywords

  • adaptive optics (AO)
  • low-density parity-check (LDPC)
  • orbital angular momentum (OAM)
  • turbulence

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Qu, Z., & Djordjevic, I. B. (2016). Approaching terabit optical transmission over strong atmospheric turbulence channels. In 2016 18th International Conference on Transparent Optical Networks, ICTON 2016 (Vol. 2016-August). [7550346] IEEE Computer Society. https://doi.org/10.1109/ICTON.2016.7550346