A Novel Optical Guiding Method Based on Acoustic OAM for FSO Enhancement

As the global demand for fast, efficient, and seamless connectivity rises annually, free space optics (FSO) has attracted great attention as a potential solution in recent years. Unfortunately, FSO communication performance is heavily affected by natural and manmade atmospheric conditions. While there have been attempts at trialling optical guiding systems previously, they are often costly and carry risks. In this paper, we present the simulated results of a dual ring 16-point source OAM acoustic wavefront, carrying a topological charge of 1, 2, and 3. The wavefront was simulated across a frequency range of 50−2000 Hz in 50 Hz intervals. We identified a key operating frequency window of 300−1200 Hz from both the simulated and theoretical results with frequencies of interest within this. The results show there is potential for a safe, cost-effective optical guiding system for short to medium link applications.