论文标题
使用复杂介质
Spectrally-resolved point-spread-function engineering using a complex medium
论文作者
论文摘要
通过强散射培养基传播光脉冲的光脉冲会产生复杂的时空斑点，可以通过多光谱传输矩阵（MSTM）描述。与空间光调节器结合使用，MSTM可以操纵离开介质的脉冲；特别是将其集中在任何所需的空间位置和/或时间上。在这里，我们演示了如何从测量的MSTM上在空间和光谱上设计焦点梁的点伸缩功能。它包括在聚焦之前在矩阵的每个波长处过滤空间内容。我们通过几个示例通过实验报告了该技术的多功能性，特别是作为同时空间和时间聚焦的替代方法，并在多光子显微镜中使用了潜在的应用。
Propagation of an ultrashort pulse of light through strongly scattering media generates an intricate spatio-spectral speckle that can be described by means of the multi-spectral transmission matrix (MSTM). In conjunction with a spatial light modulator, the MSTM enables the manipulation of the pulse leaving the medium; in particular focusing it at any desired spatial position and/or time. Here, we demonstrate how to engineer the point-spread-function of the focused beam both spatially and spectrally, from the measured MSTM. It consists in numerically filtering the spatial content at each wavelength of the matrix prior to focusing. We experimentally report on the versatility of the technique through several examples, in particular as an alternative to simultaneous spatial and temporal focusing, with potential applications in multiphoton microscopy.
