A solid-state active beamformer based on the annular-ring diffraction pattern is demonstrated in an integrated photonic platform. Such a circularly symmetric annular-ring aperture achieves a radiating element limited field of view. Furthermore, it is demonstrated that a multi-annular-ring aperture with a fixed linear density of elements maintains the beam efficiency for larger apertures while reducing the beamwidth and side-lobe level. A 255-element multi-annular-ring optical phased array with active beamforming is implemented in a standard photonics process. A total of 510 phase and amplitude modulators enable beamforming and beam steering using this aperture. A row–column drive methodology reduces the required electrical drivers by more than a factor of 5.

中文翻译：

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用于大规模光子波束形成的环形衍射图案的离散化

在集成光子平台中演示了一种基于圆环衍射图案的固态有源波束形成器。这种圆形对称的圆环孔径实现了辐射元件受限的视场。此外，研究表明，具有固定元件线性密度的多环孔径可保持较大孔径的光束效率，同时减小光束宽度和旁瓣水平。在标准光子学工艺中实现了具有主动波束形成功能的 255 元素多环光学相控阵。共有 510 个相位和幅度调制器可使用此孔径实现波束成形和波束控制。行列驱动方法将所需的电气驱动器减少了 5 倍以上。