Enhancement Security and Camouflage for Free-Space Optical Communication System Reliance on Switching between Structured Light Beams

This study explores using structured light beams Bessel, Airy, and Vortex in Free-Space Optical communication to enhance security and camouflage. These beams adapt to environmental changes and can propagate long distances while maintaining data integrity. They dynamically switch during transmission to ensure security across varying conditions. In weak to moderate turbulence, all beams can travel up to 5 km; under stronger turbulence, Bessel and Vortex beams reach over 3 km, while the Airy beam extends to 2 km. The multi-layered security approach includes beam shaping and selective switching, ensuring reliable communication. Simulations with OptiSystem 18 confirm the system's effectiveness.