Arbitrary Bias Point Control for Mach-Zehnder Modulator Using a Linear-Frequency Modulated Signal

被引：13
|
作者：
Pan, Zhouyang [1 ]
Liu, Shifeng [1 ]
Zhu, Nan [1 ]
Li, Ping [1 ]
Liu, Mingzhen [1 ]
Yang, Li [1 ]
Du, Changlong [1 ]
Zhang, Yamei [1 ]
Pan, Shilong [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Minist Educ, Key Lab Radar Imaging & Microwave Photon, Nanjing Univ Aeronaut Astronaut, Nanjing 210016, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2021年 / 33卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Radio frequency; RF signals; Optical polarization; Optical modulation; Optical feedback; Optical imaging; Optical distortion; Modulators; linear-frequency modulated signal; microwave photonics;
D O I：
10.1109/LPT.2021.3075453
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A versatile arbitrary bias control technology for Mach-Zehnder modulators (MZMs) based on a linear-frequency modulated (LFM) signal is proposed. An LFM signal is applied to the direct current (DC) port of an MZM together with a DC voltage. The output microwave signal is measured and cross-correlated with the fundamental and frequency-doubled components of the LFM signal. Their ratio serves as the feedback signal to control the bias point. An experiment is carried out. Compared to the conventional single-frequency pilot-based bias control technique, the peak power of the LFM component in the output electrical signal decreases by more than 27 dB, and the error vector magnitude (EVM) of the output microwave signal evaluated by 1000 symbols is reduced from 13.632% to 5.929%.
引用
收藏
页码：577 / 580
页数：4
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