Characteristics of array Gaussian-Schell mode beam propagating through oceanic turbulence

Ze Chen; Xiao Yuan; Xiang Zhang; Fan Gao; Baoxing Xiong

doi:10.1117/12.2533602

17 May 2019 Characteristics of array Gaussian-Schell mode beam propagating through oceanic turbulence

Ze Chen, Xiao Yuan, Xiang Zhang, Fan Gao, Baoxing Xiong

Proceedings Volume 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019); 111702A (2019) https://doi.org/10.1117/12.2533602
Event: Fourteenth National Conference on Laser Technology and Optoelectronics, 2019, Shanghai, China

Abstract

Based on the generalized Huygens-Fresnel principle, the quadratic approximation and integral transformation techniques of the Rytov phase structure function are used to derive the expression of the turbulence distance and the M² -factor of array Gaussian-Schell mode beam propagating through oceanic turbulence. The simulation methods of beam superposition are cross-spectral density function superposition and intensity superposition. The simulation results show that the turbulence distance and M² -factor of the linear array Gaussian-Schell mode beam in oceanic turbulence are related to the coherence length, the number of array beam and the separation distance. The turbulence distance and the M² -factor for superimposition of the cross-spectral density function are always smaller than for the superposition of intensity. For superimposition of the cross-spectral density function, when the propagation distance is less than 30 m and beam number is 3, the M² -factor is the smallest curve. Also, the propagation distance is less than 700 m and beam number is 1, the M² -factor is the minimum curve. When the propagating distance is more than 700 m and beam number is 3, the M² -factor is the minimum curve. The optimization of beam parameters and superposition methods can obtain the better beam quality.

Citation Download Citation

Ze Chen, Xiao Yuan, Xiang Zhang, Fan Gao, and Baoxing Xiong "Characteristics of array Gaussian-Schell mode beam propagating through oceanic turbulence", Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111702A (17 May 2019); https://doi.org/10.1117/12.2533602

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