Impacts of underwater turbulence on acoustical and optical signals and their linkage
Impacts of underwater turbulence on acoustical and optical signals and their linkage
复制标题
DOI：
10.1364/oe.21.004367
复制
发表时间：
2013-02-25
期刊：
影响因子：
3.8
通讯作者：
Weidemann, Alan
中科院分区：
文献类型：
--
作者：
Hou, Weilin;Jarosz, Ewa;Weidemann, Alan
水下声、光信号传输在民用和军事上都有着重要的意义。传输过程中的范围和信噪比，作为系统和水光学特性的函数，在吸收和散射方面，决定了部署的电光（EO）技术的有效性。最近的研究表明，来自湍流的影响与来自颗粒的影响相比，对系统性能的影响相当。本文研究了水下湍流对声散射和EO成像退化的影响，并建立了一个框架，可以用来关联这些。假设水下湍流对声散射截面和光湍流强度系数的影响相似。来自最近的现场活动，Skaneateles光学湍流演习（SOTEX，2010年7月）的数据被用来检查上述关系。结果表明，声散射截面与光电成像系统的调制传递函数相关的强度系数之间存在很强的相关性。这一重要发现将为利用远距离声回波预测光电系统性能铺平道路。2013美国光学学会Optical Society of America
Acoustical and optical signal transmission underwater is of vital interest for both civilian and military applications. The range and signal to noise during the transmission, as a function of system and water optical properties, in terms of absorption and scattering, determines the effectiveness of deployed electro-optical (EO) technology. The impacts from turbulence have been demonstrated to affect system performance comparable to those from particles by recent studies. This paper examines the impacts from underwater turbulence on both acoustic scattering and EO imaging degradation, and establishes a framework that can be used to correlate these. It is hypothesized here that underwater turbulence would influence the acoustic scattering cross section and the optical turbulence intensity coefficient in a similar manner. Data from a recent field campaign, Skaneateles Optical Turbulence Exercise (SOTEX, July, 2010) is used to examine the above relationship. Results presented here show strong correlation between the acoustic scattering cross-sections and the intensity coefficient related to the modulation transfer function of an EO imaging system. This significant finding will pave ways to utilize long range acoustical returns to predict EO system performance. (C)2013 Optical Society of America