Focusing light through scattering media by full-polarization digital optical phase conjugation.
Focusing light through scattering media by full-polarization digital optical phase conjugation.
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DOI：
10.1364/ol.41.001130
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发表时间：
2016-03-15
期刊：
影响因子：
3.6
通讯作者：
Wang LV
中科院分区：
文献类型：
--
作者：
Shen Y;Liu Y;Ma C;Wang LV
数字光学相位共轭（DOPC）是一种新兴的聚焦光通过或在散射介质，如生物组织中的技术。由于DOPC系统是基于时间反转的，它们从收集尽可能多的散射光信息中受益。然而，现有的DOPC技术受到空间光调制器工作原理的限制，只能在单一偏振状态下记录散射光并进行相位共轭。在这里，我们开发了第一个全偏振DOPC系统，它记录和相位共轭散射光沿两个正交偏振。当光通过厚散射介质（如2 mm和4 mm厚的鸡胸组织）聚焦时，我们的全偏振DOPC系统的焦峰背景比平均是单偏振DOPC系统的两倍，提高了相位共轭保真度。
Digital optical phase conjugation (DOPC) is an emerging technique for focusing light through or within scattering media such as biological tissue. Since DOPC systems are based on time reversal, they benefit from collecting as much information about the scattered light as possible. However, existing DOPC techniques record and subsequently phase-conjugate the scattered light in only a single polarization state, limited by the operating principle of spatial light modulators. Here, we develop the first full-polarization DOPC system which records and phase-conjugates scattered light along two orthogonal polarizations. When focusing light through thick scattering media, such as 2 mm and 4 mm thick chicken breast tissue, our full-polarization DOPC system on average doubles the focal peak-to-background ratio achieved by single-polarization DOPC systems and improves the phase conjugation fidelity.