一种短距离光纤频率信号传递方法研究

Research on a Short Distance Transmission Method of Optical Fiber Frequency Signal

基于导航系统光纤频率信号双环锁相传递的原理,分析了短距离光纤频率信号传输的瓶颈,提出了一种用于短距离光纤频率信号传递方法。根据双环锁相结构将携带两倍相位抖动信息的返回光信号经接收与本地信号鉴相,调整环路滤波器对相位差信号进行处理,产生环路控制信号-φp,反馈控制压控振荡器。环路滤波器稳定时,压控振荡器产生的再生信号与本地信号同频同相,达到信号稳相传输的目的。通过搭建实验模型,测试结果表明,具有较高的指标,验证了该方法的可行性与有效性。

Based on the principle of optical fiber frequency signal transmission of double phase-locked loop,the bottleneck of optical fiber frequency signal transmission is analyzed,and an optical fiber frequency signal transmission method is proposed. On the basis of double phase-locked loop structure,perform phase discrimination of the fiber frequency signal carrying double variation message in comparison with the local signal.Adjust the loop filter to process the optical differential signal,then produce loop control signal-φpand feed it back to VCO. When the loop filter is stable,the regenerated signal and the local signal have the same frequency and phase,achieving the goal of phase stabilized signal transmission. The feasibility and effectiveness of the proposed method are verified by experiments.