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。 An eight-frequency microwave signal optical generation method using a single polarization modulator (PolM) is proposed and experimentally verified. PolM generates a plurality of high-order optical sidebands under the modulation of a large signal, and only the even-numbered optical sidebands are obtained by adjusting the polarization controller (PC) and the analyzer. The modulation index (RF signal power) is reasonably adjusted so that the second- Was completely suppressed, fourth-order sideband power was significantly higher than the sixth-order and other high-order sidebands. The optical interleaving filter is used to further suppress the optical carrier and the sixth order sideband, and only the fourth order sideband is retained, and the octave frequency microwave signal is obtained by the photodetector (PD) beat frequency. The simulation scheme uses an optical interleaving filter with channel spacing of 25GHz and 50GHz, and makes full use of the periodic filtering characteristics of the optical interleaving filter to obtain continuously adjustable octave frequency microwave signals in four frequency bands. The experimental results and theoretical analysis validate the feasibility of the proposed scheme.