摘要
为提高光载无线(RoF)系统传输容量,提出了一种基于四倍频矢量信号生成及波长重用技术的双向RoF传输系统。该系统中,下行链路由基于受激布里渊散射效应的窄带光带阻滤波器和Sagnac环在光域实现四倍频矢量信号调制;在基站端,未调制的边带由检偏器滤出作为上行链路光载波实现波长重用。传输实验验证了24 GHz的四倍频正交相移键控(QPSK)信号的拍频产生,并测试了码率为400 Mbit/s的8 GHz下行频带QPSK和400 Mbit/s的上行基带开关键控(OOK)信号的6.15 km光纤传输。实验结果验证了该系统的可行性。
In order to improve the transmission capacity of the radio over fiber (RoF) system, a bidirectional RoF transmission system is proposed based on the generation of frequency quadrupled vector signal and wavelength reuse technique. For the downlink transmission, a stimulated Brillouin scattering-assisted narrow-band optical notch filter and a Sagnac loop are employed to generate a frequency-quadrupled vector signal directly in optical domain. At the base station, the unmodulated sideband of the downlink signal is filtered out by a polarizer and reused as the uplink optical carrier to achieve wavelength reuse. In the experiment, a quadrature phase shift keying (QPSK) signal centered at 24 GHz is generated by frequency beating. A 400 Mbit/s downlink QPSK signal at 8 GHz and a 400 Mbit/s baseband on-off keying (OOK) signal as uplink are used to evaluate the system performance over a 6.15 km fiber link. The feasibility of the proposed system is confirmed by the experimental result.
作者
庄云圣
潘炜
叶佳
李沛轩
唐堂
邹喜华
Zhuang Yunsheng; Pan Wei; Ye Jia; Li Peixuan; Tang Tang; Zou Xihua(Center for Information Photonics and Communications, Southwest Jiaotong University Chengdu, Sichuan 610031, China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2018年第10期241-247,共7页
Chinese Journal of Lasers
基金
国家863计划(2015AA016903)
国家自然科学基金(61775185
61405165)
四川省国际科技合作重点项目(2018HH0002)
关键词
光通信
射频光子技术
光载无线通信
波长重用
矢量信号
四倍频
optical communications
radio frequency photonics
radio over fiber communication
wavelength reuse
vector signal
quadrupling frequency