Department of Electrical Engineering, California Institute of Technology, Pasadena, CA, USA.
Nat Commun. 2021 Apr 23;12(1):2411. doi: 10.1038/s41467-021-22692-1.
For the past decade, optical wavefront shaping has been the standard technique to control light through scattering media. Implicit in this dominance is the assumption that manipulating optical interference is a necessity for optical control through scattering media. In this paper, we challenge this assumption by reporting on an alternate approach for light control through a disordered scattering medium - optical-channel-based intensity streaming (OCIS). Instead of actively tuning the interference between the optical paths via wavefront shaping, OCIS controls light and transmits information through scattering media through linear intensity operations. We demonstrate a set of OCIS experiments that connect to some wavefront shaping implementations, i.e. iterative wavefront optimization, digital optical phase conjugation, image transmission through transmission matrix, and direct imaging through scattering media. We experimentally created focus patterns through scattering media on a sub-millisecond timescale. We also demonstrate that OCIS enables a scattering medium mediated secure optical communication application.
在过去的十年中，光学波前整形一直是控制通过散射介质的光的标准技术。这种主导地位隐含的假设是，通过散射介质进行光学控制必须操纵光的干涉。在本文中，我们通过报告一种通过无序散射介质进行光控制的替代方法——基于光通道的强度流（OCIS）来挑战这一假设。OCIS 不是通过波前整形主动调整光路之间的干涉，而是通过线性强度操作来控制光并通过散射介质传输信息。我们展示了一系列与一些波前整形实现相关的 OCIS 实验，例如迭代波前优化、数字光学相位共轭、通过传输矩阵传输图像以及通过散射介质直接成像。我们在亚毫秒时间尺度上通过散射介质实验创建了聚焦图案。我们还证明了 OCIS 能够实现散射介质介导的安全光通信应用。
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