Mounaix Mickael, Carpenter Joel
School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia.
Nat Commun. 2019 Nov 8;10(1):5085. doi: 10.1038/s41467-019-13059-8.
Control of the spatial and temporal properties of light propagating in disordered media have been demonstrated over the last decade using spatial light modulators. Most of the previous studies demonstrated spatial focusing to the speckle grain size, and manipulation of the temporal properties of the achieved focus. In this work, we demonstrate an approach to control the total temporal impulse response, not only at a single speckle grain but over all spatial degrees of freedom (spatial and polarization modes) at any arbitrary delay time through a multimode fiber. Global enhancement or suppression of the total light intensity exiting a multimode fibre is shown for arbitrary delays and polarization states. This work could benefit to applications that require pulse delivery in disordered media.
在过去十年中，利用空间光调制器已经证明了对在无序介质中传播的光的空间和时间特性的控制。之前的大多数研究都展示了聚焦到散斑粒度的空间聚焦，以及对所实现聚焦的时间特性的操纵。在这项工作中，我们展示了一种控制总时间脉冲响应的方法，不仅可以在单个散斑粒度上进行控制，而且可以在任意延迟时间通过多模光纤在所有空间自由度（空间和偏振模式）上进行控制。对于任意延迟和偏振状态，都展示了从多模光纤出射的总光强的全局增强或抑制。这项工作可能会对需要在无序介质中进行脉冲传输的应用有所帮助。
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