Fig. 1. Schematic of photon response test experiment

Fig. 2. Randomly sampled laser spots under different conditions. (a) Calm water surface; (b) regular waves; (c) random waves

Fig. 3. Photon distributions obtained by Monte Carlo simulation and experimental laser spot centroid distributions. (a)(d) Calm water surface; (b)(e) regular waves; (c)(f) random waves

Fig. 4. Centroid points distributions and fitting curves on x- and y-axis under regular and random waves

Fig. 5. Spots collected at LED simulation links receiver end under different conditions. (a) Calm water surface; (b) regular waves; (c) random waves

Fig. 6. Experiment link verification system LED W2A-VLC. (a) Structure of LED experimental test link; (b) disc device of receiver end; (c) photo of LED W2A-VLC experiment platform

Fig. 7. Mean, maximum and minimum link gains of each receiver point under different conditions. (a) Calm water surface; (b) regular waves; (c) random waves