Focusing polychromatic light through strongly scattering media

被引：54
作者：
Paudel, Hari P. [1 ]
Stockbridge, Chris [1 ]
Mertz, Jerome [1 ]
Bifano, Thomas [1 ,2 ]
机构：
[1] Boston Univ, Photon Ctr, Boston, MA 02215 USA
[2] Boston Micromachines Corp, Cambridge, MA USA
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 14期
基金：
美国国家科学基金会;
关键词：
ADAPTIVE OPTICS; 2-PHOTON MICROSCOPY; PULSE-PROPAGATION; TURBID MEDIA; SPECKLE; FLUCTUATIONS; TRANSMISSION; INTENSITY; WAVES; TIME;
D O I：
10.1364/OE.21.017299
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate feedback-optimized focusing of spatially coherent polychromatic light after transmission through strongly scattering media, and describe the relationship between optimized focus intensity and initial far-field speckle contrast. Optimization is performed using a MEMS spatial light modulator with camera-based or spectrometer-based feedback. We observe that the spectral bandwidth of the optimized focus depends on characteristics of the feedback signal. We interpret this dependence as a modification in the number of independent frequency components, or spectral correlations, transmitted by the sample, and introduce a simple model for polychromatic focus enhancement that is corroborated by experiment with calibrated samples. (C) 2013 Optical Society of America
引用
收藏
页码：17299 / 17308
页数：10
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