A Novel High-Linearity Microwave Photonic Link Based on the Strategy of Adding a Compensation Path Using a Bidirectional Phase Modulator

被引：16

作者：

Jiang, Tianwei ^{[1
]}

Wu, Ruihuan ^{[1
]}

Yu, Song ^{[1
]}

Wang, Dongsheng ^{[1
]}

Gu, Wanyi ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2016年 / 8卷 / 05期

基金：

中国博士后科学基金;

关键词：

Microwave photonics; microwave photonics signal processing; tunable filter; MACH-ZEHNDER MODULATOR; POLARIZATION MODULATOR; SAGNAC LOOP; LINEARIZATION; IMPROVEMENT; SYSTEM;

D O I：

10.1109/JPHOT.2016.2614500

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 novel phase-modulation direct-demodulation microwave photonic link for improving the spurious-free dynamic range (SFDR) is proposed and experimentally demonstrated. In the proposed system, two different C-band optical wavelengths are modulated by a phase modulator in opposite directions. After combining the wavelengths, a fiber Bragg grating (FBG) is used to remove the optical spectrum between the two wavelengths. Because of the natural and wideband pi phase difference between the up and low optical sidebands after the phase modulation, third-order intermodulation distortion (IMD3) can be counteracted by subtly designing the optical power and modulation depth relationships between the two wavelengths. The experimental results show that IMD3 is reduced by 28.6 dB, achieving an SFDR improvement of 20 dB compared to a traditional single side-band phase-modulation microwave photonic link.

引用

页数：7

共 22 条

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