Li Jingwei, Zheng Huaibin, He Yuchen, Liu Yanyan, Wei Xiaoyong, Xu Zhuo
Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China.
National Key Laboratory of Electromagnetic Space Security, The 53rd Research Institute of China Electronics Technology Group Corporation, 300308, Tianjin, China.
Nanophotonics. 2023 Oct 20;12(21):4017-4030. doi: 10.1515/nanoph-2023-0382. eCollection 2023 Oct.
The current approach to 2D optical phased array (OPA) encounters challenges, such as the requirement for a highly tunable laser that is incompatible with certain 2D beam-steering applications or significant power consumption, large antenna spacing and complex wiring resulting from independent control of array elements. To address these challenges, we propose an OPA architecture based on cascaded periodically poled LiNbO sequences, a multi-layered domains engineered structure within the LiNbO electro-optic crystal, only two control electronics to program the 2D beam-steering trajectory with a range of approximately = ±20° and = ±16° through simulations. This structure enables the uniform distribution of phase differences between adjacent array elements (adjacent domains) upon beam exit from the crystal, ensuring optimal performance. The aim of this study is to develop a methodology that employs domain engineering techniques for designing high-performance phase-controlled devices with customized functional units and sequences in electro-optical crystals. Our research has implications for emerging optoelectronic applications, such as customizable optical interconnects and integrated LiDAR systems.
当前二维光学相控阵（OPA）的方法面临挑战，例如需要高度可调谐激光器，这与某些二维光束转向应用不兼容，或者存在功耗大、天线间距大以及由于对阵列元件进行独立控制而导致布线复杂等问题。为应对这些挑战，我们提出了一种基于级联周期性极化铌酸锂序列的OPA架构，这是一种在铌酸锂电光晶体内的多层畴工程结构，通过模拟仅需两个控制电子元件就能编程二维光束转向轨迹，其范围约为θ = ±20°和φ = ±16°。这种结构能够在光束从晶体出射时使相邻阵列元件（相邻畴）之间的相位差均匀分布，确保最佳性能。本研究的目的是开发一种方法，该方法利用畴工程技术在电光晶体中设计具有定制功能单元和序列的高性能相位控制装置。我们的研究对新兴的光电子应用具有启示意义，如可定制的光互连和集成激光雷达系统。
