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Femtosecond Filament Coupled with Structured Light for Free-Space Optical Communication

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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.

Funding

National Geospatial Intelligent Agency grant #HM04762010012.

History

Email Address of Submitting Author

bassep@rpi.edu

Submitting Author's Institution

Rensselaer Polytechnic Institute

Submitting Author's Country

United States of America