陈书青^1，， 郑之伟^2，， 李瑛^3，*

（  1、微纳光电器件及应用教育部重点实验室，信息科学与工程学院，湖南大学，长沙 410082；       2、微纳光电器件及应用教育部重点实验室，信息科学与工程学院，湖南大学，长沙，410082；       3、微纳光电器件及应用教育部重点实验室，物理与微电子学院，湖南大学，长沙，410082；  ）

摘要： 本文研究了两个强度调制器级联产生八倍频光载太赫兹波的全双工传输系统。在传输系统的中心站使用两个矢量正交的12.5 GHz射频信号分别调制的两个强度调制器上产生四阶光边带，再利用光纤布拉格光栅 (FBG)把上边带载波滤除，下行NRZ信号通过一个强度调制器调制到上边带载波。在基站，有调制信号的一个边带与另一个边带形成间隔为0.1THz单边带光载太赫兹信号，而被Interleaver滤除的中心载波作为上行的光载波，通过另一个强度调制器调制上行NRZ信号。仿真结果表明，本传输系统经过100 km单模光纤传输后，上行和下行信号的眼图都较清晰。说明使用本方案产生的太赫兹传输系统具有较好的抗色散性能。
关键词： 太赫兹；八倍频；长距离传输；光载无线

Chen Shuqing^1,， Zheng Zhiwei^2,， Li Ying^3,*

（  1、Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, College of Information Science and Engineering, Hunan University, ChangSha 410082；       2、Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, College of Information Science and Engineering, Hunan University, Changsha, 410082；       3、Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, College of Physics and Microelectronic Science, Hunan University, Changsha, 410082；  ）

Abstract： We have proposed wavelength reuse scheme for a full-duplex 0.1THz ROF system. In the central station, two cascaded Mach-Zehnder modulators have been used to produce fourth-order sidebands, the downlink data is modulated on upper sideband and coupled with original optical carrier and lower sideband. At base station, a interleaver is employed to separete the optical mm-wave and original optical carrier. The pure optical carrier is modulated uplink data and transimit back to center station(CS). The simulation results show that 0.1 THz wave was generated by employing 12.5 GHz RF clock source, both uplink and downlink are modulated with 5 Gb/s baseband data, after transimitted 100 km SMF, eye pattern opened clearly. This scheme can resist chromatic dispersion effectively and suitable for long distance transimission.

Tag：

点此返回栏目查看更多>>>参考论文