共 7 条
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
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%.
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页码:1775 / 1777
页数:3
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