Influence of oceanic turbulence on propagation characteristics of Gaussian array beams
Influence of oceanic turbulence on propagation characteristics of Gaussian array beams
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DOI：
10.1016/j.ijleo.2014.07.113
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发表时间：
2014-01-01
期刊：
影响因子：
3.1
通讯作者：
Yang, Ting
中科院分区：
文献类型：
--
作者：
Lu, Lu;Ji, Xiaoling;Yang, Ting
基于Nikishov提出的海洋湍流功率谱，利用5个传输特征参数（即，均方波束宽度、瑞利范围、湍流距离、桶内功率和斯特列尔比）。结果表明，随着温度和盐度对折射率谱的贡献比τ和均方温度耗散率chir的增大以及单位质量流体动能耗散率τ的减小，海洋光学湍流对激光传输的影响越来越大，这与本文对海洋湍流的进一步分析相一致。此外，还发现激光在深海区的传输受海洋光学湍流的影响要比在活动区或海洋表面的影响大。(C)2014 Elsevier GmbH. All rights reserved.
Based on the power spectrum of oceanic turbulence proposed by Nikishov, the influence of oceanic optical turbulence on propagation of Gaussian array beams is studied in detail by using five propagation characteristic parameters (i.e., mean-squared beam width, Rayleigh range, turbulence distance, power in the bucket and Strehl ratio). It is shown that the influence of oceanic optical turbulence on propagation of laser beams becomes stronger as tau (ratio of temperature to salinity contribution to the refractive index spectrum) and chi r (rate of dissipation of mean-squared temperature) increase and epsilon (rate of dissipation of kinetic energy per unit mass of fluid) decreases, which is in agreement with the further analysis of oceanic turbulence shown in this paper. Furthermore, it is concluded that propagation of laser beams is more affected by oceanic optical turbulence in abyssal region than that in active region or oceanic surface. (C) 2014 Elsevier GmbH. All rights reserved.