用于光束形成和激光雷达的稀疏非周期阵列。

Sparse aperiodic arrays for optical beam forming and LIDAR.

作者信息

Komljenovic Tin, Helkey Roger, Coldren Larry, Bowers John E

出版信息

Opt Express. 2017 Feb 6;25(3):2511-2528. doi: 10.1364/OE.25.002511.

DOI:10.1364/OE.25.002511

PMID:29519096

Abstract

We analyze optical phased arrays with aperiodic pitch and element-to-element spacing greater than one wavelength at channel counts exceeding hundreds of elements. We optimize the spacing between waveguides for highest side-mode suppression providing grating lobe free steering in full visible space while preserving the narrow beamwidth. Optimum waveguide placement strategies are derived and design guidelines for sparse (> 1.5 λ and > 3 λ average element spacing) optical phased arrays are given. Scaling to larger array areas by means of tiling is considered.

摘要

我们分析了通道数超过数百个元件的、具有非周期间距且元件间距大于一个波长的光学相控阵。我们优化了波导之间的间距，以实现最高的边模抑制，从而在整个可见光空间内实现无光栅瓣的转向，同时保持窄波束宽度。推导了最佳波导放置策略，并给出了稀疏（平均元件间距> 1.5 λ且> 3 λ）光学相控阵的设计指南。还考虑了通过平铺扩展到更大阵列面积的方法。