Xianghong Yan, Tong Wang, Baiqiu Zhao, Peng Lin, Xu Guo, Hechun Zhang, Xiaonan Yu. Optimization of Underwater Laser Communication Performance Based on Beam Divergence Angle Control[J]. Acta Optica Sinica, 2025, 45(5): 0506001
- Acta Optica Sinica
- Vol. 45, Issue 5, 0506001 (2025)
Fig. 1. Schematic diagram of workflow of UWOC system with beam divergence angle regulation
Fig. 2. Structure of beam divergence angle control system
Fig. 3. Schematic of simulating spot size. (a) Initial position; (b) move to the left to reduce beam divergence angle; (c) move to the right to increase beam divergence angle
Fig. 4. Simulation of relationship between beam divergence angles and capture time
Fig. 5. Variations of signal-to-noise ratio with beam divergence angle under different water quality conditions
Fig. 6. Variations of bit error rate with beam divergence angle under different water quality conditions
Fig. 7. Underwater laser communication experimental device
Fig. 8. Comparison of simulation and experimental results for different beam divergence angle capture time
Fig. 9. Waveform diagrams corresponding to different beam divergence angles. (a) 1 mrad; (b) 8 mrad; (c) 15 mrad
Fig. 10. Comparison of simulation and experimental results for bit error rates under different beam divergence angles
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Table 1. Parameter setting in theoretical models
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Table 2. Comparisons of performance between traditional fixed beam divergence angle UWOC system and beam divergence angle controlled UWOC system
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