曾羽婷,周慧,陈明,莘云龙,费楚媛.基于18倍频技术的60GHz光载无线通信系统研究[J].光电子激光,2019,30(7):704~711 |
基于18倍频技术的60GHz光载无线通信系统研究 |
Research on 60GHz radio over fiber system based on 18-tuple frequency technology |
投稿时间:2019-01-21 |
DOI: |
中文关键词: 光载无线通信系统 光载毫米波 18倍频 高非线性光纤 四波混频 |
英文关键词:radio over fiber system optical millimeter-wave 18-tuple frequen cy highly nonlinear fiber four-wave mixing |
基金项目:国家自然科学基金(61701180,9)、湖南省自然科学基金(2017JJ3212)和湖南省教育厅基金项目(17C0957)资助项目 (1.湖南师范大学 信息科学与工程学院,湖南 长沙 410081; 2.湖南师范大学 物理与电 子科学学院,湖南 长沙 410081; 3.复旦大学 信息科学与工程学院,上海 200433) |
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中文摘要: |
理论提出并仿真研究了采用铌酸锂-马赫曾德尔 调制器(LN-MZM)和高非线性光纤(HNLF)中四 波混频(FWM)效应产生18倍频光载毫米波的光载无线通信(ROF)系 统。在中心站(CS),通过调节 LN-MZM的直流偏置电压和调制深度,射频(RF)信号间的相位差,产生±3阶边带,再利 用强度调制器 将基带数据调制到-3阶边带上,耦合后的两个3阶边带经光纤发送至基站(BS)。在基站 ,将耦合后的±3阶边带送入HNLF,经过FWM后生成±9阶边带,经滤波后在光电检测器中拍频得到18倍频 电毫米波信 号。仿真结果表明,采用3.3 GHz的RF信号,可产生频率为60 GHz的光载毫米波。2.5 Gb/s信号经光纤传 输40 km后,信号质量仍然良好。还研究了HNLF的输入光功率和长度 对系统性能的影响,得到了系统性能最佳的条件。 |
英文摘要: |
A scheme of radio over fiber (ROF) system to generate 18-tuple frequ ency optical millimeter-wave by using a LiNbO3Mach-Zehnder modulator (LN-MZM) and four-wave mixing in high ly nonlinear fiber (HNLF) is theoretically proposed and investigated by simulation.In the central station (C S),the ±3order sidebands are produced by properly adjusting the direct current bias and the modulation depth of the LN-MZM,and the phase difference of radio frequency (RF) signals.The baseband data is modulated on th e -3order sideband by the intensity modulator.Then the coupled ±3order sidebands are transmitted to the base station (BS) through fiber.In the base station,the coupled ±3order sidebands are sent to the HNLF,and ±9order sidebands are generated after four-wave mixing (FWM) effect.After optical filtering,an electrical millimete r-wave signal with 18-tuple frequency is obtained by beating frequency in the photoelectric detector.The si mulation result shows that the 60GHz optical millimeter-wave is generated by using 3.3GHz RF signal.The 2.5Gb/s data signal quality is still good after transmitted over 40km fiber.Furthermore,the effects of the input op tical power and the length of HNLF on the system performance are also investigated,and the optimal condition of th e system performance is obtained. |
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