基于外调制器的可控八倍频光载毫米波生成技术研究  

Research on the Controllable Frequency Octupling Technology for Generating Optical Millimeter-Wave by External Modulator

作　　者：商建明 王道斌[1] 刘延君[1] 元丽华[1] 雷景丽[1] 李晓晓[1] 侯尚林[1] 

机构地区：[1]兰州理工大学理学院,甘肃兰州730050

出　　处：《光学学报》2014年第5期31-36,共6页Acta Optica Sinica

基　　金：国家自然科学基金(61367007;61167005);甘肃省自然科学基金(1112RJZA017;1112RJZA018);兰州理工大学博士科研启动基金

摘　　要：采用了二加一的结构,提出了一种基于三并联集成马赫-曾德尔调制器(MZM)、可应用于毫米波光载无线通信(RoF)系统的新型高质量八倍频光载毫米波信号生成方案。该方案通过利用两个子马赫-曾德尔调制器(subMZMs)间射频(RF)驱动信号的电相位差为90来很好地消除两种冗余边带,再使用第三个子马赫-曾德尔调制器(sub-MZM)的偏压调整来获取最佳信号。仿真结果表明在不采用任何光或电滤波器的情况下,常规消光比(30dB)时,射频杂散抑制比(RFSSR)可以达到38.3315dB。而在理想消光比(100dB)时,光边带抑制比(OSSR)最高可达61.22878dB。该方案在理想和常规消光比下均能得到高质量的毫米波信号。A novel scheme is proposed for generating high quality frequency octupling signal, which can be used in millimeter-wave radio-over-fiber （RoF） system. It＇s based on an integrated structure of triple-parallel Mach-Zehnder modulator （MZM） by using two adding one structure. Two kinds of redundant sidebands are well eliminated by adopting 90° of the electric phase-difference between two sub Mach-Zehnder modulators （sub-MZMs）, driven by radio frequency （RF） signal. Moreover, bias of the third sub Mach-Zehnder modulator （sub-MZM） is tailored to get the best signal. The simulation results show that the radio frequency spurious suppression ratio （RFSSR） is as high as 38. 3315 dB under the condition of conventional extinction ratio （30 dB） without any optical or electrical filter. Furthermore, optical sideband suppression ratio （OSSR） can reach as high as 61. 22878 dB at ideal extinction ratio （100 dB）. For not only conventional condition but also the ideal case, the scheme can get high quality millimeterwave signal.

关 键 词：光通信 八倍频 光边带抑制比 射频杂散抑制比 

分 类 号：TN929.11[电子电信—通信与信息系统]