Shen Yuecheng, Liu Yan, Ma Cheng, Wang Lihong V
Opt Lett. 2016 Mar 15;41(6):1130-3. doi: 10.1364/OL.41.001130.
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, to the best of our knowledge, full-polarization DOPC system that 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.
数字光学相位共轭（DOPC）是一种新兴技术，用于通过生物组织等散射介质或在其中聚焦光。由于DOPC系统基于时间反转，它们受益于收集尽可能多的关于散射光的信息。然而，现有的DOPC技术仅在单偏振状态下记录并随后对散射光进行相位共轭，这受到空间光调制器工作原理的限制。在此，据我们所知，我们开发了首个全偏振DOPC系统，该系统沿两个正交偏振记录并对散射光进行相位共轭。当通过厚散射介质（如2毫米和4毫米厚的鸡胸组织）聚焦光时，我们的全偏振DOPC系统平均使单偏振DOPC系统实现的焦峰与背景比翻倍，并提高了相位共轭保真度。
