Optical complex media as universal reconfigurable linear operators
Optical complex media as universal reconfigurable linear operators
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DOI：
10.1364/optica.6.000465
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发表时间：
2019-04-20
期刊：
影响因子：
10.4
通讯作者：
Popoff, Sebastien M.
中科院分区：
文献类型：
--
作者：
Matthes, Maxim E. W.;del Hougne, Philipp;Popoff, Sebastien M.
使用光学器件执行线性运算是从电信到光学模拟计算和机器学习的许多领域中的重要组成部分。对于这些应用中的许多应用，关键要求是对制造不准确性的鲁棒性、可重构性和可扩展性。我们提出了一种方法来执行线性操作，使用复杂的光学介质，如多模光纤或散射介质作为一个计算平台驱动的波前整形。给定一个表示光在这种介质中传播的大的随机传输矩阵，我们可以通过找到合适的输入和输出投影仪来提取任何所需的较小的线性算子。我们证明了这一概念，找到输入波前使用空间光调制器，导致复杂的介质作为一个所需的复值线性算子的光场。我们实验性地构建了几个16 x 16的运算符，并讨论了我们的方法的可扩展性的基本限制。它提供了可重构的，鲁棒的，易于制造的线性光学模拟计算单元的前景。(C)根据OSA开放获取出版协议的条款，2019年美国光学学会
Performing linear operations using optical devices is a crucial building block in many fields ranging from telecommunications to optical analog computation and machine learning. For many of these applications, key requirements are robustness to fabrication inaccuracies, reconfigurability, and scalability. We propose a way to perform linear operations using complex optical media such as multimode fibers or scattering media as a computational platform driven by wavefront shaping. Given a large random transmission matrix representing light propagation in such a medium, we can extract any desired smaller linear operator by finding suitable input and output projectors. We demonstrate this concept by finding input wavefronts using a spatial light modulator that cause the complex medium to act as a desired complex-valued linear operator on the optical field. We experimentally build several 16 x 16 operators and discuss the fundamental limits of the scalability of our approach. It offers the prospect of reconfigurable, robust, and easy-to-fabricate linear optical analog computation units. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement