A 1-D Heterodyne Lens-Free Optical Phased Array Camera With Reference Phase Shifting
A 1-D Heterodyne Lens-Free Optical Phased Array Camera With Reference Phase Shifting
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DOI：
10.1109/jphot.2018.2871823
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发表时间：
2018-09-01
影响因子：
2.4
通讯作者：
Hajimiri, Ali
中科院分区：
文献类型：
--
作者：
Abiri, Behrooz;Fatemi, Reza;Hajimiri, Ali
本文介绍了第一个集成的硅光子光学相控阵（OPA）接收机与成像能力。使用具有96 × 50 μ m（2）的总孔径尺寸的32元件一维（1-D）OPA来产生电可操纵的“凝视光束"。OPA接收器元件将入射光耦合到芯片上的波导，该波导被处理为相控阵接收器。为了最大限度地减少信号损耗并提高灵敏度，采用了在本地参考路径中具有移相器的外差架构。OPA接收器可以提供完全可编程的角度选择性，具有30度的无栅瓣视场和0.74度的凝视波束宽度。
This paper presents the first integrated silicon photonics optical phased array (OPA) receiver with imaging capabilities. A 32-element one-dimensional (1-D) OPA with an overall aperture size of 96 x 50 mu m(2) is used to generate an electrically steerable "gazing beam." The OPA receiver elements couple the incident light to on-chip waveguides that is processed as a phased array receiver. To minimize signal loss and enhance sensitivity, a heterodyne architecture with phase shifters in the local reference path is utilized. The OPA receiver can provide fully programmable angular selectivity with a grating-lobe-free field-of-view of 30 degrees and a gazing beamwidth of 0.74 degrees.