Li Wei, Yang Kecheng, Xia Min, Rao Jionghui, Zhang Wei
Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Opt Express. 2009 Sep 28;17(20):17772-83. doi: 10.1364/OE.17.017772.
Marine micro-bubbles are one of those important constituents that influence scattering characteristics of water column. Monte Carlo Based simulations show that a water entrained bubble cloud generate a characteristic backscatter of incident laser light [M. Xia, J. Opt. A: Pure Appl. Opt. 8, 350 (2006)]. This characteristic can be used to detect and localize bubble clouds, leading to wide ranging applications, especially in optical remote sensing. This paper describes tests of an underwater lidar system applied to detecting cloud of micro-bubbles. Laboratory experiments demonstrate that the system is capable of detecting bubbles ranging from diameter 10 microm approximately 200 microm, over a distance of 7-12 m from the detector. The dependence of the lidar return signal on size distribution of bubbles, concentration, thickness and location of bubble clouds is studied and compared with simulation results.
海洋微气泡是影响水柱散射特性的重要成分之一。基于蒙特卡罗方法的模拟表明，夹带水的气泡云会产生入射激光的特征后向散射[M. Xia，《光学A：纯应用光学》8，350（2006）]。这一特性可用于检测和定位气泡云，从而带来广泛的应用，尤其是在光学遥感领域。本文描述了用于检测微气泡云的水下激光雷达系统的测试。实验室实验表明，该系统能够在距探测器7至12米的距离内检测直径约10微米至200微米的气泡。研究了激光雷达回波信号对气泡尺寸分布、浓度、气泡云厚度和位置的依赖性，并与模拟结果进行了比较。
