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Femtosecond Filament Coupled with Structured Light for Free-Space Optical Communication
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  • Saad Bin Ali Reza ,
  • Tianhong Wang ,
  • Finn Buldt ,
  • Pascal Bassene ,
  • Moussa N'Gom
Saad Bin Ali Reza
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Tianhong Wang
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Finn Buldt
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Pascal Bassene
Rensselaer Polytechnic Institute

Corresponding Author:[email protected]

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Moussa N'Gom
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Abstract

The generation of a laser filament through clouds produces a shockwave which displaces the small water droplets from the air to create a quasi-transparent channel through which, information can be transmitted. We present a robust method that utilizes the channel for free-space optical communication using structured light beams coupled with a femtosecond filament. Structured light beams based on their spatial profiles are perfectly suited to propagate around the filament. We have also developed a 4-bit communication channel using a segmented annular beam. Our system demonstrates resilience to noise and is unaffected by the filament. This method can improve the scalability, robustness, and capacity of the free optical channel.