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.
{"title":"High-speed 2D beam steering with Large Field of View based on Thin-Film Lithium Niobate Optical Phased Array","authors":"Wenlei Li, Xu Zhao, Jianghao He, Hao Yan, Bingcheng Pan, Zichen Guo, Xiang E Han, Jingye Chen, Daoxin Dai, Yaocheng Shi","doi":"10.1364/prj.502439","DOIUrl":"https://doi.org/10.1364/prj.502439","url":null,"abstract":"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.","PeriodicalId":20048,"journal":{"name":"Photonics Research","volume":"49 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136376710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ye Xiang, Yongping Zhai, Jiazhi Yuan, Ke Ren, Xuchao Zhao, Dongda Wu, Junqiao La, Yi Wang, Wenxin Wang
{"title":"Amplified spontaneous emission at the band edges of Ag-coated Al nanocone array","authors":"Ye Xiang, Yongping Zhai, Jiazhi Yuan, Ke Ren, Xuchao Zhao, Dongda Wu, Junqiao La, Yi Wang, Wenxin Wang","doi":"10.1364/prj.503656","DOIUrl":"https://doi.org/10.1364/prj.503656","url":null,"abstract":"","PeriodicalId":20048,"journal":{"name":"Photonics Research","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135729500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiaoyu Jin, Jie Zhao, Dayong Wang, John Healy, Lu Rong, Yunxin Wang, ShuFeng Lin
{"title":"Continuous-wave terahertz digital holographic diffraction tomography based on physics-enhanced deep neural network","authors":"Xiaoyu Jin, Jie Zhao, Dayong Wang, John Healy, Lu Rong, Yunxin Wang, ShuFeng Lin","doi":"10.1364/prj.493902","DOIUrl":"https://doi.org/10.1364/prj.493902","url":null,"abstract":"","PeriodicalId":20048,"journal":{"name":"Photonics Research","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136078688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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