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激光光束经过不透明散射介质的聚焦 被引量：10

Focusing Laser Beams through Opaque Scattering Media
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摘要 由于多重散射的影响,当激光光束经过散射介质(例如牛奶、生物组织等)之后将形成散斑。如何调制激光光束,使其经过散射介质之后能实现有效地聚焦是一项具有重要意义的研究工作。研究了利用空间光调制器和连续顺序反馈优化算法对入射光波前进行相位调制,从而实现了激光光束经过散射介质的有效聚焦,得到的最大光强增长因子为50.6139。还研究了空间光调制器上的总调制单元个数、每个调制单元的相位精度对光强增长因子的影响。实验研究结果表明,目标位置处的光强随着总调制单元数的增加而增加,并且随着调制单元的相位精度的增加而增强。 Because of multiple scattering, laser beam is diffused and transforms into speckle when propagating through scattering media, such as milk, biological tissue et al. Realization of diffused light into a focal spot by modulating the wavefront of the incident beams is of great significance. In this study, focusing laser beams through opaque scattering media is achieved by introducing the spatial light modulator and continuous sequential feedback algorithm to modulate phase of the incident beam. The maximum enhancement factor of intensity obtained is 50.6139. The influence of the number of square segments of the spatial light modulation and the phase precision of every segment on the enhancement factor of intensity is discussed. Experimental result shows that light intensity at the target area increases with the increasing number of square segments of the spatial light modulation, and becomes stronger with the increasing phase precision.
作者 黄惠玲 陈子阳 孙存志 蒲继雄
机构地区 华侨大学信息科学与工程学院
出处 《中国激光》 EI CAS CSCD 北大核心 2015年第6期30-35,共6页 Chinese Journal of Lasers
基金 国家自然科学基金(61178015,11304104)
关键词 激光光学 散射 聚焦 反馈优化算法 相位调制 laser optics scattering focusing feedback optimization algorithm phase modulation
分类号 O436 [机械工程—光学工程]
  • 相关文献

参考文献25

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共引文献32

同被引文献56

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引证文献10

二级引证文献40

中国激光
2015年 第6期

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