High-speed 2D beam steering based on a thin-film lithium niobate optical phased array with a large field of view  

作　　者：WENLEI LI XU ZHAO JIANGHAO HE HAO YAN BINGCHENG PAN ZICHEN GUO XIANG’E HAN JINGYE CHEN DAOXIN DAI YAOCHENG SHI 

机构地区：[1]State Key Laboratory for Modern Optical Instrumentation,Center for Optical and Electromagnetic Research,International Research Center for Advanced Photonics,Ningbo Research Institute,College of Optical Science and Engineering,Zhejiang University,China [2]School of Physics,Xidian University,Xi’an 710071,China

出　　处：《Photonics Research》2023年第11期1912-1918,共7页光子学研究（英文版）

基　　金：National Key Research and Development Program of China (2021YFB2801703);National Natural Science Foundation of China (62105286,62135011);“Pioneer” and “Leading Goose” RD Program of Zhejiang(2022C01103);Natural Science Foundation of Ningbo Municipality (2023J282);Fundamental Research Funds for the Central Universities。

摘　　要：An on-chip optical phased array (OPA) is considered as a promising solution for next generation solid-state beam steering.However,most of the reported OPAs suffer from low operating bandwidths,making them limited in many applications.We propose and demonstrate a high-speed 2D scanning OPA based on thin-film lithium niobate phase modulators with traveling-wave electrodes.The measured modulation bandwidth is up to 2.5 GHz.Moreover,an aperiodic array combined with a slab grating antenna is also used to suppress the grating lobes of far-field beams,which enables a large field of view (FOV) as well as small beam width.A 16-channel OPA demonstrates an FOV of 50°×8.6°and a beam width of 0.73°×2.8°in the phase tuning direction and the wavelength scanning direction,respectively.

关 键 词：OPTICAL ANTENNA tuning 

分 类 号：O43[机械工程—光学工程]