Large-scale optical phased array using a low-power multi-pass silicon photonic platform
Large-scale optical phased array using a low-power multi-pass silicon photonic platform
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DOI：
10.1364/optica.7.000003
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发表时间：
2020-01-20
期刊：
影响因子：
10.4
通讯作者：
Lipson, Michal
中科院分区：
文献类型：
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作者：
Miller, Steven A.;Chang, You-Chia;Lipson, Michal
光学相控阵技术是超小型固体激光雷达和自由空间通信系统中一种很有前途的光束控制技术。长距离、高性能的阵列需要一个大的光束发射区域，该区域密集地填充有数千个主动相位控制、高功耗的发光元件。迄今为止，这种大规模的相控阵列一直不可能实现，因为目前所展示的技术将在难以维持的电力水平下运行。在这里，我们展示了一个集成到大规模相控阵列中的多通光子平台，它将移相器的功耗降低了近9倍。多通结构将热光移相器的功耗降低到1.7 mW/pi的P-pi，而不牺牲速度或光带宽。使用这个平台，我们展示了一个包含512个主动控制元件的硅光子相控阵列，在70度x 6度的视场内执行2D光束转向时仅消耗1.9 W的功率。我们的研究结果展示了一条通往构建包含数千个有源元件的可扩展相控阵列的道路。(C)根据OSA开放获取出版协议的条款，2020年美国光学学会
Optical phased arrays are a promising beam-steering technology for ultra-small solid-state lidar and free-space communication systems. Long-range, high-performance arrays require a large beam emission area densely packed with thousands of actively phase-controlled, power-hungry light emitting elements. To date, such large-scale phased arrays have been impossible to realize since current demonstrated technologies would operate at untenable electrical power levels. Here we show a multi-pass photonic platform integrated into a large-scale phased array that lowers phase shifter power consumption by nearly 9 times. The multi-pass structure decreases the power consumption of a thermo-optic phase shifter to a P-pi of 1.7 mW/pi without sacrificing speed or optical bandwidth. Using this platform, we demonstrate a silicon photonic phased array containing 512 actively controlled elements, consuming only 1.9 W of power while performing 2D beam steering over a 70 degrees x 6 degrees field of view. Our results demonstrate a path forward to building scalable phased arrays containing thousands of active elements. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement