基于硅基光学相控阵, 提出一种结合了相位控制和不同周期光栅发射器的点阵扫描法, 以实现大范围的二维光束扫描.对光束扫描装置进行仿真计算, 结果表明, 仅使用单波长的光源即可实现120°×100°的扫描范围和超过16×400个可分辨点.此光束扫描装置在应用时, 同一时刻仅需要一部分有源器件工作, 降低了相调所需的电能耗.所提方法为实现大范围、低成本和低功耗的二维光束扫描装置提供了一种可能的解决方案, 尤其适用于低成本的固态激光雷达.

An alternative approach to realize 2D beam steering with ultra-wide range by silicon integrated optical phased array is proposed. A dot matrix scanning method, using the phase control and grating emitters with different periods, is conceived to design the optical phased array device without the requirement of tunable lasers. Simulations demonstrate an ultra-wide steering range up to 120°×100°, together with over 16×400 resolvable points by using a single-wavelength laser. Moreover, the designed optical phased array device demands only a part of active elements working simultaneously, which benefits to reduce the electrical power consumption. The proposed approach provides a promising solution for wide-angle, low-cost, and low-power consumption 2D beam steering devices, especially suitable for solid-state light detection and ranging systems.