QAM signal with electric field sensor based on thin-film lithium niobate [Invited]

被引：4

作者：

Li, Tingan ^{[1
]}

Liu, Zhao ^{[1
]}

Pan, An ^{[1
]}

Shang, Chenglin ^{[1
]}

Liu, Yong ^{[2
]}

Zeng, Cheng ^{[1
]}

Xia, Jinsong ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

[2] Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, Chengdu 610054, Peoples R China

来源：

CHINESE OPTICS LETTERS | 2023年 / 21卷 / 12期

基金：

中国国家自然科学基金;

关键词：

thin-film lithium niobate; electric field sensor; QAM signal; ANTENNA-COUPLED ELECTRODES; ELECTROOPTIC MODULATOR; MICROWAVE;

D O I：

10.3788/COL202321.120041

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Large-bandwidth, high-sensitivity, and large dynamic range electric field sensors are gradually replacing their traditional counterparts. The lithium-niobate-on-insulator (LNOI) material has emerged as an ideal platform for developing such devices, owing to its low optical loss, high electro-optical modulation efficiency, and significant bandwidth potential. In this paper, we propose and demonstrate an electric field sensor based on LNOI. The sensor consists of an asymmetric Mach-Zehnder interferometer (MZI) and a tapered dipole antenna array. The measured fiber-to-fiber loss is less than -6.7 dB, while the MZI structure exhibits an extinction ratio of greater than 20 dB. Moreover, 64-QAM signals at 2 GHz were measured, showing an error vector magnitude (EVM) of less than 8%.

引用

页数：6

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