A Phase-Modulated Microwave Photonic Link With an Extended Transmission Distance

被引:17
作者
Li, Ruoming [1 ,2 ]
Han, Xiuyou [1 ]
Chen, Xiang [1 ]
Chen, Xiangfei [2 ]
Yao, Jianping [1 ]
机构
[1] Univ Ottawa, Sch Elect Engn & Comp Sci, Microwave Photon Res Lab, Ottawa, ON K1N 6N5, Canada
[2] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China
基金
加拿大自然科学与工程研究理事会;
关键词
Microwave photonics; phase modulation; coherent detection; analog photonic link; COHERENT RECEIVER; DYNAMIC-RANGE;
D O I
10.1109/LPT.2015.2478135
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 technique to transport a microwave signal over an optical fiber based on phase-modulation and coherent in-phase (I) and quadrature-phase (Q) demodulation with an extended transmission distance is proposed and experimentally demonstrated. In the transmitter, a Sagnac loop incorporating a phase modulator (PM) is used to generate two orthogonally polarized optical signals with one being phase modulated and the other with no modulation that acts as a remote optical reference signal. The orthogonally polarized optical signals are transmitted over a single-mode fiber (SMF) to a polarization and phase diversity coherent receiver, and are coherently detected with a free-running optical local oscillator at the receiver. Since the phase-modulated and the reference signals are transmitted over the same SMF, the optical phases are correlated, and the original signal can be recovered based on a digital signal processing algorithm. The proposed technique is experimentally evaluated. Compared with a phase-modulated coherent I/Q demodulated link without using an optical phase correlated reference signal, the transmission distance is extended from 50 m to 10 km, while providing a link gain and a spurious-free dynamic range (SFDR) of -9.5 dB and 115.8 dB.Hz(2/3), respectively.
引用
收藏
页码:2563 / 2566
页数:4
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