Highly Linear Radio-Over-Fiber System Incorporating a Single-Drive Dual-Parallel Mach-Zehnder Modulator

被引：107

作者：

Li, Shangyuan ^{[1
]}

Zheng, Xiaoping ^{[1
]}

Zhang, Hanyi ^{[1
]}

Zhou, Bingkun ^{[1
]}

机构：

[1] Tsinghua Univ, Tsinghua Natl Lab Informat Sci & Technol, Lab Opt Networking & Microwave Photon, State Key Lab Integrated Optoelect,Dept Elect Eng, Beijing 100084, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2010年 / 22卷 / 24期

关键词：

Modulator linearization; radio-over-fiber (RoF); spurious-free dynamic range (SFDR); vector modulation; INTERMODULATION DISTORTION;

D O I：

10.1109/LPT.2010.2082516

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：

We propose a highly linear radio-over-fiber system with low intermodulation distortion (IMD) using a single-drive dual-parallel Mach-Zehnder modulator (SD-DPMZM). The optical carrier is modulated in one of the two parallel modulators, while remaining unmodulated in the other one. There exists optimal working points for SD-DPMZM that makes its two kinds of origins of third-order IMD (IMD3) have opposite phase and equal intensity, and cancel each other; hence the output IMD3 is suppressed dramatically. Experimental results show that the proposed scheme can achieve a spurious-free dynamic range of up to 122.9 dB . Hz(2/3), which is in agreement with the theoretical analysis. It is about 20 dB more than a conventional MZM. The error vector magnitude of the proposed scheme, for a 16-QAM 10-MSym/s signal centered at 4 GHz, is 1.94%.

引用

页码：1775 / 1777

页数：3

共 7 条

[1] Highly Linear Integrated Optical Transmitter for Subcarrier Multiplexed Systems [J].