High-resolution aliasing-free optical beam steering
High-resolution aliasing-free optical beam steering
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DOI：
10.1364/optica.3.000887
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发表时间：
2016-08-20
期刊：
影响因子：
10.4
通讯作者：
Rong, Haisheng
中科院分区：
文献类型：
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作者：
Hutchison, David N.;Sun, Jie;Rong, Haisheng
许多应用，包括激光(LIDAR)测绘、自由空间光通信和空间分辨光学传感器，都需要紧凑、坚固的解决方案来引导光束。在这些系统中，良好的目标寻址能力(高转向分辨率)需要同时实现宽转向角和小波束发散，但由于分辨率和转向范围之间的基本权衡，这是困难的。到目前为止，据我们所知，基于芯片的两轴光学相控阵已经实现了相控阵轴线上不超过23个可分辨光点的分辨率。在这里，我们报道了一种在大规模发射极阵列上使用非均匀发射极间距的高性能两轴可控光学相控阵，该相控阵在300 mm的CMOS设备上制造，具有500多个可分辨光斑和相控阵轴向80度转向(测量受限)，并且在两个轴上都有创纪录的小发散(0.14度)。包括另一个(波长控制的)轴上显示的转向范围，这相当于将二维波束转向超过60,000个可分辨的点。(C)2016年度美国光学学会
Many applications, including laser (LIDAR) mapping, free-space optical communications, and spatially resolved optical sensors, demand compact, robust solutions to steering an optical beam. Fine target addressability (high steering resolution) in these systems requires simultaneously achieving a wide steering angle and a small beam divergence, but this is difficult due to the fundamental trade-offs between resolution and steering range. So far, to our knowledge, chip-based two-axis optical phased arrays have achieved a resolution of no more than 23 resolvable spots in the phased-array axis. Here we report, using non-uniform emitter spacing on a large-scale emitter array, a dramatically higher-performance two-axis steerable optical phased array fabricated in a 300 mm CMOS facility with over 500 resolvable spots and 80 degrees steering in the phased-array axis (measurement limited) and a record small divergence in both axes (0.14 degrees). Including the demonstrated steering range in the other (wavelength-controlled) axis, this amounts to two-dimensional beam steering to more than 60,000 resolvable points. (C) 2016 Optical Society of America