Scintillations of optical plane and spherical waves in underwater turbulence.
Scintillations of optical plane and spherical waves in underwater turbulence.
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DOI：
10.1364/josaa.31.001552
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发表时间：
2014-07
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影响因子：
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通讯作者：
Y. Ata;Y. Baykal
中科院分区：
文献类型：
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作者：
Y. Ata;Y. Baykal
利用Rytov方法计算了光学平面波和球面波在水下湍流介质中传播时的闪烁指数，并研究了均方温度耗散率、温度和盐度起伏、传播距离、波长、Kolmogorov微尺度长度和湍流动能耗散率等参数对闪烁指数的影响。结果表明，与大气中一样，在水下介质中，平面波比球面波更容易受到湍流的影响。对于平面波，水下湍流效应在5-10 m处变得显著，而对于球面波，水下湍流效应在20-25 m处变得显著。湍流效应在深水中相对较小，在水面处较大。与温度引起的湍流相比，盐度引起的湍流强烈地主导了微膨胀。
The scintillation indices of optical plane and spherical waves propagating in underwater turbulent media are evaluated by using the Rytov method, and the variations in the scintillation indices are investigated when the rate of dissipation of mean squared temperature, the temperature and salinity fluctuations, the propagation distance, the wavelength, the Kolmogorov microscale length, and the rate of dissipation of the turbulent kinetic energy are varied. Results show that as in the atmosphere, also in underwater media the plane wave is more affected by turbulence as compared to the spherical wave. The underwater turbulence effect becomes significant at 5-10 m for a plane wave and at 20-25 m for a spherical wave. The turbulence effect is relatively small in deep water and is large at the surface of the water. Salinity-induced turbulence strongly dominates the scintillations compared to temperature-induced turbulence.