首页|Properties of focused Laguerre-Gaussian beam propagating in anisotropic ocean turbulence

Properties of focused Laguerre-Gaussian beam propagating in anisotropic ocean turbulence

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We analyze the properties of a focused Laguerre-Gaussian(LG)beam propagating through anisotropic ocean turbu-lence based on the Huygens-Fresnel principle.Under the Rytov approximation theory,we derive the analytical formula of the channel capacity of the focused LG beam in the anisotropic ocean turbulence,and analyze the relationship between the capacity and the light source parameters as well as the turbulent ocean parameters.It is found that the focusing mirror can greatly enhance the channel capacity of the system at the geometric focal plane in oceanic turbulence.The results also demonstrate that the communication link can obtain high channel capacity by adopting longer beam wavelength,greater initial beam waist radius,and larger number of transmission channels.Further,the capacity of the system increases with the decrease of the mean squared temperature dissipation rate,temperature-salinity contribution ratio and turbulence outer scale factor,and with the increase of the kinetic energy dissipation rate per unit mass of fluid,turbulence inner scale factor and anisotropy factor.Compared to a Hankel-Bessel beam with diffraction-free characteristics and unfocused LG beam,the focused LG beam shows superior anti-turbulence interference properties,which provide a theoretical reference for research and development of underwater optical communication links using focused LG beams.

vortex beamorbital angular momentumfocusing mirroranisotropic turbulence

王新光、马洋斌、袁邱杰、陈伟、王乐、赵生妹

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College of Science,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Institute of Signal Processing and Transmission,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Key Lab of Broadband Wireless Communication and Sensor Network Technology(Ministry of Education),Nanjing University of Posts and Telecommunications,Nanjing 210003,China

National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093,China

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Science and Technology Innovation Training Program of Nanjing University of Posts and TelecommunicationsNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Nanjing University of Posts and TelecommunicationsOpen Research Fund of National Laboratory of Solid State Microstructures

CXXZD20230806187123462001249NY222133M36055

2024

10.1088/1674-1056/ad053c

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(2)
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