Experimental Study on Scintillation Index of Vortex Beam Propagation in Underwater Turbulence

被引：0
|
作者：
Lu T.-F. [1 ]
Liu Y.-X. [1 ]
Pu J.-X. [1 ]
机构：
[1] Fujian Provincial Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen, 361021, Fujian
来源：
Guangzi Xuebao/Acta Photonica Sinica | 2019年 / 48卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Light intensity distribution; Scintillation index; Topological charge; Underwater turbulence; Vortex beam;
D O I：
10.3788/gzxb20194812.1214004
中图分类号：
学科分类号：
摘要：
In order to study the scintillation characteristics of vortex beam and Gaussian beam in underwater turbulence, an experimental system consisting of water turbulence have been set up. In the water tank, the intensity of turbulence is controlled by using a circulating pump, and the scintillation index of the beam is measured by using a scintilloscope. Using this experimental system, the scintillation index of vortex beams and Gaussian beams propagating in underwater turbulence are investigated in detail. It is found that the scintillation indices of vortex beams and Gaussian beams are getting bigger with the increasing of the transmission distance, as well as with the increase of the intensity of underwater turbulence. Within the propagation distance 12.6 meters, the scintillation index of vortex beam with topological charge m=2 is much bigger than that of Gaussian beam. At 5.4 meters, the radial scintillation index of vortex beam with m=6 decreases firstly and then increases in underwater turbulence. In addition, the scintillation index of a topological vortex beam with topological charge m=6 is lower than that of a topological vortex beam with topological charge m=4 after a certain distance of propagation. The research results obtained by our experiments have important value in exploring the application of vortex beam in oceanic turbulence. © 2019, Science Press. All right reserved.
引用
收藏
相关论文
共 17 条
  • [1] Pu H., Ji X.-L., Problems of optical imaging in oceanic turbulence, Acta Optica Sinica, 36, 10, (2016)
  • [2] Yi X., Li Z., Liu Z.-J., Underwater optical communication performance for laser beam propagation through weak oceanic turbulence, Applied Optics, 54, 6, pp. 1273-1278, (2015)
  • [3] Hou W.-L., A simple underwater imaging model, Optics Letters, 34, 17, pp. 2688-2690, (2009)
  • [4] Hanson F., Lasher M., Effects of underwater turbulence on laser beam propagation and coupling into single-mode optical fiber, Applied Optics, 49, 16, pp. 3224-3230, (2010)
  • [5] Wang F., Liu X.-L., Liu L., Et al., Experimental study of the scintillation index of a radially polarized beam with controllable spatial coherence, Applied Physics Letters, 103, 9, (2013)
  • [6] Kajiura K., A model of the bottom boundary layer in water waves, Bulletin of the Earthquake Research Institute, 46, pp. 75-123, (1968)
  • [7] Nikishov V.V., Nikishov V.I., Spectrum of turbulent fluctuations of the sea-water refraction index, International Journal of Fluid Mechanics Research, 27, 1, pp. 82-98, (2000)
  • [8] Yang T.-X., Zhao S.-M., Random phase screen model of ocean turbulence, Acta Optica Sinica, 37, 12, (2017)
  • [9] Lu L., Ji X.-L., Li X.-Q., Et al., Influence of oceanic turbulence on propagation characteristics of Gaussian array beams, Optik-International Journal for Light and Electron Optics, 125, 24, pp. 7154-7161, (2014)
  • [10] Yang T., Ji X.-L., Li X.-Q., Propagation characteristics of partially coherent decentred annular beams propagating through oceanic turbulence, Acta Physica Sinica, 64, 20, pp. 212-220, (2015)
12