基于单个偏振调制器和光交错滤波器的八倍频微波信号产生研究

发布时间：2018-07-30 08:42

【摘要】：提出并实验验证了一种采用单个偏振调制器(PolM)的八倍频微波信号光学产生方法。PolM在大信号调制下产生多个高阶光边带,通过调节偏振控制器(PC)和检偏器,仅获得偶数阶光边带;合理调节其调制指数(射频信号功率),使得二阶边带被完全抑制,四阶边带功率明显高于六阶及其它高阶边带。采用光交错滤波器进一步抑制光载波及六阶边带,仅保留四阶边带,经光电探测器(PD)拍频获得八倍频微波信号。仿真方案选用25GHz和50GHz信道间隔的光交错滤波器,充分利用光交错滤波器的周期滤波特性,在4个频段范围内获得了连续可调的八倍频微波信号。实验结果和理论分析有效验证了所提出方案的可行性。
[Abstract]:An octave-frequency microwave signal optical generation method using a single polarization modulator (PolM). PolM generates multiple high-order optical sideband under large signal modulation. By adjusting the polarization controller (PC) and polarizer, only even-order optical sideband is obtained. The modulation exponent (RF signal power) is adjusted reasonably, so that the second-order sideband is completely suppressed, and the fourth-order sideband power is obviously higher than that of the sixth-order sideband and other high-order sideband. The optical interlacing filter is used to further suppress the optical carrier and the sixth order sideband, only the fourth order sideband is retained, and the octave frequency microwave signal is obtained by the (PD) beat frequency of the photodetector. In the simulation scheme, the 25GHz and 50GHz channel interval optical interleaved filters are used to obtain the continuously adjustable octave microwave signals in four frequency bands by making full use of the periodic filtering characteristics of the optical interleaved filters. The experimental results and theoretical analysis verify the feasibility of the proposed scheme.
【作者单位】：西南交通大学信息与科学技术学院信息光子与通信研究中心;
【基金】：国家自然科学基金(61378008) 教育部新世纪优秀人才项目(NCET-12-0940) 高校博士点基金(20110184130003、20100184120007)资助项目
【分类号】：TN911.3

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