提出了一种毫米波本振信号的相位稳定传送技术。采用迈克耳孙干涉原理,将传输过程中的信号相位扰动信息调制在信号臂上,通过反射部分信号臂信号,并与参考臂信号干涉拍频,获得传输过程中的相位扰动信息,从而反馈控制光纤延时器,对系统进行相位校正。在建立传送系统的理论模型和实验系统的基础上,实验测试了本振信号的相位漂移与光纤长度漂移及干涉拍频输出信号之间的关系,理论和实验结果取得了一致。研究结果表明,这一本振信号传送方案的可行性。

A system of phase stabilized distribution of millimeter wave local oscillator is proposed,which is based on the principle of Michelson interferometer.In the system,the signal phase drift during transition is modulated on the reflected optical signal,which is later coherent heterodyne with reference signal to control the fiber stretcher.Then system phase can be corrected and the phase of output millimeter wave can keep stable.Based on the theoretical model and experimental system,the relationship of phase drift of local oscillator,the length drift of optical fiber and coherent heterodyne output signal are measured.The experimental results agree with the theoretical model,which indicates that the proposed system is feasible.