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Fractal, diffraction-encoded space-division multiplexing for FSO with misalignment-robust, roaming transceivers.

Xiaojing Weng1, Luat T Vuong2

  • 1Department of Mechanical Engineering, University of California at Riverside, Riverside, 92521, CA, USA.

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|February 18, 2022
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Summary
This summary is machine-generated.

This study introduces diffractal space-division multiplexing (DSDM) for free space optical (FSO) communication, enabling robust performance despite transceiver misalignment. DSDM supports roaming transceivers and enhances data capacity through spatial multiplexing.

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Area of Science:

  • Optical Communications
  • Wireless Technology
  • Signal Processing

Background:

  • Free space optical (FSO) systems suffer performance degradation due to transceiver misalignment.
  • Tracking narrow optical beams over long distances presents a significant challenge in FSO communication.

Purpose of the Study:

  • To propose and analyze a novel FSO transmission system, diffractal space-division multiplexing (DSDM), designed to accommodate misaligned and roaming transceivers.
  • To enhance data capacity in FSO links through spatial multiplexing with partial off-axis beam reception.

Main Methods:

  • Numerical simulation and performance analysis of the DSDM system.
  • Investigation of key parameters including divergence angle, roaming area, kernel bit-error-rate (K-BER), and fractal order.

Main Results:

  • The DSDM system demonstrates capability in supporting misaligned transceivers.
  • Simulations achieved kernel bit-error-rates (K-BER) of 10^-6 with fractal beams at 2.5 km link distances.
  • Effective performance was observed when receiver sizes were 30% of the effective beam diameter.

Conclusions:

  • Diffractal space-division multiplexing (DSDM) offers a viable solution for robust FSO communication in the presence of transceiver misalignment.
  • The proposed DSDM system enhances data capacity and reliability for FSO links with roaming capabilities.