Jiuhang Nan, Yiping Han. Dual-Channel Multiband Vortex Optical Communication[J]. Acta Optica Sinica, 2021, 41(12): 1206001
- Acta Optica Sinica
- Vol. 41, Issue 12, 1206001 (2021)
Fig. 1. Phase and intensity of Laguerre-Gaussian beams with p=1 and m=3. (a) Phase; (b) intensity
Fig. 2. Light intensity produced by the coherent superposition of U0,10 and U0,3. (a) Theoretical result; (b) experimental result
Fig. 3. Structure diagram of multiband multiband vortex optical communication system
Fig. 4. Dual-channel multiband modulation signal. (a) First signal; (b) second signal
Fig. 5. Encoding method
Fig. 6. 16 kinds of superimposed light intensity correlations. (a) Beam groups {U0,4,U0,6,U0,8,U0,10} and {U0,2,U0,3,U1,2,U1,3}; (b) beam groups {U0,4,U0,6,U0,8,U0,10} and {U0,-2,U0,-3,U1,2,U1,3}
Fig. 7. Phase distribution diagrams corresponding to 16 symbols. The left side represents the phase diagrams, the middle represents the theoretical simulation diagrams at z=0 m, and the right side is the light intensity diagrams recorded by the CCD camera at z=1 m
Fig. 8. Atmospheric turbulence phase simulation diagram at
Fig. 9. Light intensity diagrams under different atmospheric turbulence conditions. (a)
Fig. 10. Structure diagram of VGG16 model
Fig. 11. Training data set
Fig. 12. Test accuracy and test loss during training process
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Table 1. Coding results of 16 kinds of symbols in beam sets {U0,4,U0,6,U0,8,U0,10} and {U0,2,U0,3,
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