Silicon nonlinear switch as a conditional circulator for monostatic LiDAR systems
Silicon nonlinear switch as a conditional circulator for monostatic LiDAR systems
复制标题
硅非线性开关作为单基地 LiDAR 系统的条件循环器
DOI：
10.1364/prj.444480
复制
发表时间：
2022-02-01
影响因子：
7.6
通讯作者：
Dai, Daoxin
中科院分区：
文献类型：
--
作者：
Ding, Mingfei;Xie, Yiwei;Dai, Daoxin
基于全光学硅光子学的激光雷达系统可实现扫描分辨率和速度方面的理想特性，并利用尺寸、重量和成本等其他优势。在硅光子学中实现光循环器可以实现发射器和接收器的光路的双向使用，从而简化了系统配置，从而降低了系统成本。在这项工作中，据我们所知，我们首次对使用非线性开关的单基地 LiDAR 系统的全无源硅光子条件循环器进行了实验验证。所提出的硅非线性干涉仪是通过功率分配电路控制信号功率分布来实现的，允许激光雷达发射器和接收器共享相同的光路。与需要永磁体的传统概念不同，本装置是通过使用常见的硅光子波导和标准的铸造兼容制造工艺来实现的。通过几个额外的移相器，演示的设备使用单芯片表现出相当大的灵活性，这对于与 LiDAR 系统中的光电探测器阵列集成更具吸引力。 (C)2022中国激光出版社
All-optical silicon-photonics-based LiDAR systems allow for desirable features in scanning resolution and speed, as well as leverage other advantages such as size, weight, and cost. Implementing optical circulators in silicon photonics enables bidirectional use of the light path for both transmitters and receivers, which simplifies the system configuration and thereby promises low system cost. In this work, to the best of our knowledge, we present the first experimental verification of all-passive silicon photonics conditional circulators for monostatic LiDAR systems using a nonlinear switch. The proposed silicon nonlinear interferometer is realized by controlling signal power distribution with power-splitting circuits, allowing the LiDAR transmitter and receiver to share the same optical path. Unlike the traditional concept requiring a permanent magnet, the present device is implemented by using common silicon photonic waveguides and a standard foundry-compatible fabrication process. With several additional phase shifters, the demonstrated device exhibits considerable flexibility using a single chip, which can be more attractive for integration with photodetector arrays in LiDAR systems. (C) 2022 Chinese Laser Press