基于铌酸锂波导的高速低功耗光学相控阵

Fast-speed and low-power-consumption optical phased array based on lithium niobate waveguides.

作者信息

Wang Zhizhang, Li Xueyun, Ji Jitao, Sun Zhenxing, Sun Jiacheng, Fang Bin, Lu Jun, Li Shaobo, Ma Xiang, Chen Xiangfei, Zhu Shining, Li Tao

机构信息

National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China.

Optical Communication Research and Development Center, The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang, 050051, China.

出版信息

Nanophotonics. 2024 Mar 28;13(13):2429-2436. doi: 10.1515/nanoph-2024-0066. eCollection 2024 May.

DOI:10.1515/nanoph-2024-0066

PMID:39633667

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11501545/

Abstract

Fast scanning speed and low-power consumption are becoming progressively more and more important in realizing high-performance chiplet optical phased arrays (OPAs). Here, we successfully demonstrated integrated OPAs with multiple waveguides channels based on thin-film lithium niobate-on-insulator (LNOI) platform. Specifically, two lithium niobate (LN) OPA chips have been implemented with 32 and 48 channels LN waveguides, respectively, enabled by electro-optic modulations, which showcases the low power consumption (1.11 nJ/π) and fast operation speed (14.4 ns), showing obvious advantage of the LNOI platform over others. As results, we experimentally achieved a beam steering with a 62.2° × 8.8° field of view (FOV) and a beam divergence of 2.4° × 1.2° for 32 channels, and a FOV of 40° × 8.8° and a beam divergence of 0.33° × 1.8° for 48 channels. This work also demonstrates the feasibility of LNOI platform in scalable OPA chips.

摘要

在实现高性能小芯片光学相控阵（OPA）方面，快速扫描速度和低功耗正变得越来越重要。在此，我们基于绝缘体上薄膜铌酸锂（LNOI）平台成功展示了具有多个波导通道的集成OPA。具体而言，分别采用32通道和48通道的铌酸锂（LN）波导实现了两个铌酸锂OPA芯片，通过电光调制实现，其展示出低功耗（1.11 nJ/π）和快速运行速度（14.4 ns），显示出LNOI平台相对于其他平台的明显优势。结果，我们通过实验实现了32通道的62.2°×8.8°视场（FOV）光束转向和2.4°×1.2°的光束发散，以及48通道的40°×8.8°视场和0.33°×1.8°的光束发散。这项工作还证明了LNOI平台在可扩展OPA芯片中的可行性。