Active imaging and structured illumination originated in “bulk” optical systems: free-space beams controlled with lenses, spatial light modulators, gratings, and mirrors to structure the optical diffraction and direct the beams onto the target. Recently, optical phased arrays have been developed with the goal of replacing traditional bulk active imaging systems with integrated optical systems. In this paper, we demonstrate the first array of optical phased arrays forming a composite aperture. This composite aperture is used to implement a Fourier-based structured-illumination imaging system, where moving fringe patterns are projected on a target and a single integrating detector is used to reconstruct the spatial structure of the target from the time variation of the back-scattered light. We experimentally demonstrate proof-of-concept Fourier-basis imaging in 1D using a six-element array of optical phased arrays, which interfere pairwise to sample up to 11 different spatial Fourier components, and reconstruct a 1D delta-function target. This concept addresses a key complexity constraint in scaling up integrated photonic apertures by requiring only $N$ elements in a sparse array to produce an image with ${N^2}$ resolvable spots.

中文翻译：

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具有集成光学相控阵阵列的傅里叶基结构照明成像

主动成像和结构化照明起源于“体”光学系统：由透镜、空间光调制器、光栅和反射镜控制的自由空间光束，以构建光学衍射并将光束引导到目标上。最近，已经开发出光学相控阵，其目标是用集成光学系统取代传统的体有源成像系统。在本文中，我们展示了形成复合孔径的第一组光学相控阵。该复合孔径用于实现基于傅立叶的结构照明成像系统，其中移动条纹图案被投影到目标上，并使用单个积分检测器根据背向散射的时间变化重建目标的空间结构。光。我们使用六元光学相控阵列阵列通过实验证明了 1D 概念验证傅立叶基成像，该阵列成对干涉以对多达 11 个不同的空间傅立叶分量进行采样，并重建一维 delta 函数目标。这个概念解决了扩大集成光子孔径的关键复杂性约束，只需要稀疏数组中的$N$ 个元素以生成具有${N^2}$可解析点的图像。