Chinese Optics, Volume. 17, Issue 2, 300(2024)
Propagation properties of one-dimensional array vortex beams in a marine atmosphere
Compared to a single vortex beam, vortex array beams can increase the information transmission capacity. Therefore, studying the propagation properties of vortex array beams is significant for their optical communication applications. In this paper, we select the helical Ince-Gaussian (HIGn,n) modes of order n and simulate the marine atmosphere turbulence using the power spectrum of the refractive index fluctuations in the marine atmosphere. The changes in intensity, phase, scintillation index and spot centroid wander of a one-dimensional array vortex beam in marine atmospheric turbulence have been investigated systematically by using the phase screen method. We find that (1) an increase in either the turbulence intensity or atmospheric turbulence inner scale enhances both the scintillation index and spot centroid wander standard deviation for HIGn,n modes; (2) the scintillation index of HIGn,n mode with odd n decreases with increasing mode order, and is higher than that of HIGn,n mode for even n; (3) the HIGn,n mode with order n>1 has better stability than the LG0,1 mode; and (4) the higher the mode order, the smaller the standard deviation of spot centroid wander of HIGn,n mode. In addition, we perform comparative study on the propagation performance of the linear array vortex beams (LAVBs) and HIG beams. Our study indicates that although LAVBs have better propagation performance than HIG beams, the unique structures of HIG beams can be applied to various application scenarios. Finally, the effects of both the ellipticity parameter and elliptic ring number on the propagation of the HIG modes are explored and analyzed. The results show that increasing either the ellipticity parameter or elliptic ring number is beneficial to improving the anti-turbulence ability of the HIG modes. These results offer significant guidance for the offshore vortex beams application.
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Zheng-cheng HOU, Ming-ming ZHANG, Sheng-chuang BAI, Shu-zhen LI, Jun LIU, You-you HU. Propagation properties of one-dimensional array vortex beams in a marine atmosphere[J]. Chinese Optics, 2024, 17(2): 300
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Received: May. 30, 2023
Accepted: Aug. 30, 2023
Published Online: Apr. 15, 2024
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