光子学报, 2015, 44 (2): 0229002, 网络出版: 2015-02-15  

激光通过散射介质的聚焦

Focusing of Laser Through Scattering Media
作者单位
华侨大学 信息科学与工程学院,福建省光传输与变换重点实验室, 福建 厦门 361021
摘要
基于角谱衍射公式和散射介质的圆形高斯分布模型, 数值模拟光通过散射介质的聚焦.通过反馈优化算法实现散射光束的波前整形, 在目标位置处形成一个很亮的聚焦光斑.改变聚焦目标位置后, 可实现任意位置处的单点或多点聚焦.讨论了空间光调制器上的总调制单元个数、每个调制单元相位准确度与光强增长因子的关系.结果表明:目标位置处的光强随着总像素单元数的增加而线性地增强, 并且随着调制单元的相位准确度的增加而增强.
Abstract
Based on angular spectrum diffraction theorem and circular Gaussian distribution model of scattering media, light focusing through scattering media was numerically simulated. A high contrast focus in the target area is produced by using a feedback optimization algorithm to shape the wavefront of the scattering light. By adjusting the target area, it is also possible to form one or multiple foci at will. The influence of the number of square segments of the spatial light modulation and the phase precision of a single segment on the intensity enhancement was discussed. The result shows that the light intensity at the target area increases linearly with the increasing number of square segments of the spatial light modulation, and becomes stronger with the increasing phase precision.

黄惠玲, 孙存志, 陈子阳, 蒲继雄. 激光通过散射介质的聚焦[J]. 光子学报, 2015, 44(2): 0229002. HUANG Hui-ling, SUN Cun-zhi, CHEN Zi-yang, PU Ji-xiong. Focusing of Laser Through Scattering Media[J]. ACTA PHOTONICA SINICA, 2015, 44(2): 0229002.

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