Optical phased array (OPA) can achieve beam steering by controlling the phase distribution of each channel. In traditional OPA, 2π phase tuning range is required to achieve beam steering. However, large phase tuning range can lead to large size, high power consumption, high operating voltage and low speed. Moreover, the performance of OPA with small phase tuning range, such as metasurface OPA, degrades greatly in traditional method. Here, we propose a design method of OPA with insufficient phase tuning range (<2π), >10 dB side-mode suppression ratio (SMSR) can be achieved with any phase tuning range.

中文翻译：

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一种相位调谐范围不足的光相控阵设计方法

光相控阵（OPA）可以通过控制每个通道的相位分布来实现光束控制。在传统的 OPA 中，需要 2π 相位调谐范围来实现波束控制。然而，大的相位调谐范围会导致大尺寸、高功耗、高工作电压和低速度。此外，具有小相位调谐范围的 OPA（例如超表面 OPA）的性能在传统方法中大大降低。在这里，我们提出了一种相位调谐范围不足 (<2π) 的 OPA 设计方法，可以在任何相位调谐范围内实现 >10 dB 边模抑制比 (SMSR)。