Digital optical phase conjugation for delivering two-dimensional images through turbid media.

Digital optical phase conjugation for delivering two-dimensional images through turbid media.
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数字光相结合,用于通过浑浊介质传递二维图像。

DOI:
10.1038/srep01909
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Yaqoob, Zahid
Yaqoob, Zahid
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hillman, Timothy R.;Yamauchi, Toyohiko;Choi, Wonshik;Dasari, Ramachandra R.;Feld, Michael S.;Park, YongKeun;Yaqoob, Zahid

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Optical transmission through complex media such as biological tissue is fundamentally limited by multiple light scattering. Precise control of the optical wavefield potentially holds the key to advancing a broad range of light-based techniques and applications for imaging or optical delivery. We present a simple and robust digital optical phase conjugation (DOPC) implementation for suppressing multiple light scattering. Utilizing wavefront shaping via a spatial light modulator (SLM), we demonstrate its turbidity-suppression capability by reconstructing the image of a complex two-dimensional wide-field target through a highly scattering medium. Employing an interferometer with a Sagnac-like ring design, we successfully overcome the challenging alignment and wavefront-matching constraints in DOPC, reflecting the requirement that the forward- and reverse-propagation paths through the turbid medium be identical. By measuring the output response to digital distortion of the SLM write pattern, we validate the sub-wavelength sensitivity of the system.
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