赵明山

个人信息Personal Information

教授

博士生导师

硕士生导师

主要任职:Head, Photonics Research Center,

其他任职:辽宁省先进光电子技术重点实验室 主任

性别:男

毕业院校:比利时根特大学

学位:博士

所在单位:光电工程与仪器科学学院

学科:光学工程. 测试计量技术及仪器. 通信与信息系统

办公地点:光仪学院厚望楼405

联系方式:Tel:0411 84706491

电子邮箱:mszhao@dlut.edu.cn

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Sagnac Interferometer-Assisted Microwave Photonic Link With Improved Dynamic Range

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论文类型:期刊论文

发表时间:2017-04-01

发表刊物:IEEE PHOTONICS JOURNAL

收录刊物:SCIE、EI

卷号:9

期号:2

ISSN号:1943-0655

关键字:Microwave photonics; spurious-free dynamic range (SFDR); Sagnac interferometer; error vector magnitude (EVM)

摘要:In this paper, we propose a simple method to improve the spurious-free dynamic range (SFDR) of a microwave photonic link (MPL). The proposed method is based on a Sagnac interferometer structure; signal output of the Sagnac interferometer consists of two kinds of optical components: the clockwise (CW) modulated optical signal and the counter clockwise (CCW) unmodulated optical carrier. An appropriate situation is then created to satisfy the phase and power ratio condition of the two counter propagating light waves. Eventually, in photodiode, part of the third-order intermodulation distortion (IMD3) component is generated by the CW light wave and another part is generated by the CW sidebands beating with the CCW optical carrier. Under appropriate circumstances, these two kinds of IMD3s have same amplitude but opposing phase; hence, the IMD3 can be cancelled, and an enhanced SFDR is achieved. An experiment is conducted, and results show that, as compared with a conventional MPL, the SFDR of the proposed link is improved by 10.3 dB, and for a 16-quadrature amplitude modulation (QAM) 10-MSym/s signal centered at 15 GHz, the error vector magnitude is reduced by 5.9%.