海洋混合悬浮颗粒对蓝绿激光的散射特性研究  

Scattering Characteristics of Marine Mixed Suspended Particles to Blue and Green Lasers

作　　者：王明军[1,2,3] 王主玉 黄朝军 WANG Ming-jun;WANG Zhu-yu;HUANG Chao-jun(School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,China;School of Physics and Telecommunications Engineering,Shaanxi University of Technology,Hanzhong 723001,China;Shaanxi Civil-Military Integration Key Laboratory of Intelligence Collaborative Networks,Xi’an 710126,China)

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]陕西理工大学物理与电信工程学院,陕西汉中723001 [3]陕西省智能协同网络军民共建重点实验室,陕西西安710126

出　　处：《光谱学与光谱分析》2022年第6期1749-1754,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(61771385);陕西省杰出青年科学基金项目(2020JC-42)资助。

摘　　要：激光在水下的传输很大程度上会受到海水中悬浮颗粒物的影响,而目前对于海洋中悬浮颗粒物光散射的理论研究大多是针对单一成分的悬浮粒子而进行的,但是在真实海洋中悬浮颗粒物都是以多种成分混合的颗粒群形式而存在的,因此研究真实海洋中混合悬浮颗粒物对蓝绿激光的散射特性具有重要意义。该研究选取了对蓝绿激光传输产生较大影响的浮游藻类植物、悬浮泥沙、碎屑、悬浮气泡和矿物质这五种常见的悬浮颗粒物作为研究对象,充分考虑真实海况中这五种悬浮颗粒物的不同混合情况,构建了海水中混合球形悬浮颗粒物对蓝绿激光的散射特性模型。数值计算了海水中五种物质混合的球形悬浮颗粒物对532 nm蓝绿激光的统计平均光散射参量和平均散射相函数,分析不同混合悬浮颗粒物的混合比对平均散射、吸收和消光系数以及单次反照率随着粒子有效半径和粒子数浓度变化的影响,同时分析了不同粒子尺寸下的不同混合比对混合悬浮颗粒物的平均散射相函数随着角度变化的影响。数值结果表明,当悬浮泥沙在整个混合模型中占比越大时,平均散射系数越大,而当悬浮藻类粒子在整个混合模型中占比增大时,平均吸收系数增大,由此可知海洋中对光造成主要影响的五种常见悬浮颗粒物中,悬浮泥沙对光散射作用影响最大,悬浮藻类粒子对光吸收作用影响最大。随着悬浮颗粒物浓度的增大,混合粒子的单次反照率保持不变,由此可知混合悬浮颗粒物的平均光散射参量随着粒子浓度的增长速率是一致的。海洋中混合悬浮颗粒物的平均散射相函数随着粒子的有效半径的增大而增大,散射作用最大的混合比下的悬浮颗粒物其平均散射相函数最大,悬浮颗粒物的前向散射较强。该工作对蓝绿激光在海水中传输、信道建模,水下无线光通信的研究以及激光探测都�The transmission of laser underwater is largely affected by suspended particles in seawater.At present,most theoretical studies on the light scattering of suspended particles in the ocean are carried out on single-component suspended particles.However,suspended particles in the real ocean exist in a group of particles mixed with multiple components.Therefore,it is of great significance to study the scattering characteristics of blue-green lasers by mixed suspended particles in the real ocean.In this paper,five common suspended particles which have a greater impact on the transmission of blue-green lasers are planktonic algae,suspended sediments,debris,suspended bubbles,and minerals as the research objects.Fully considering the different mixing situations of these five suspended particles in real sea conditions,a model of the scattering characteristics of blue-green lasers by mixed spherical suspended particles in seawater is constructed.The statistical average light scattering parameters and average scattering phase function of 532 nm blue-green lasers of spherical suspended particles mixed with five seawater substances are calculated numerically.They are analyzing the influence of the mixing ratio of different mixed suspended particles on the average scattering,absorption and extinction coefficients and single albedo with the effective radius of the particles and the change of the particle number concentration.At the same time,the influence of different mixing ratios under different particle sizes on the average scattering phase function of mixed suspended particles with angle changes is analyzed.Numerical results show that the average scattering coefficient increases when the proportion of suspended sediment in the entire mixed model increases,while the average absorption coefficient increases with the proportion of suspended algae particles in the entire mixed model.It can be seen that among the five common suspended particles that have a major impact on the light in the ocean,suspended sediment has the greate

关 键 词：蓝绿激光 混合悬浮颗粒物 统计平均光散射参量 散射相函数 

分 类 号：O436.2[机械工程—光学工程]