为解决光纤频率传输系统大规模组网带来的中心设备复杂、工作负荷大和可靠性低等问题, 提出了一种相位波动在远端自主补偿的频率传输新方法。该方法采用波分复用技术, 将信号通过双支路传输至远端, 通过鉴相、相关计算实现相位波动的高精度测量, 通过电学移相实现高精度补偿。理论仿真验证了该方法的有效性。在传输频率为10MHz、通信窗口分别为1310和1550nm、光纤链路长度为25km的仿真测试中, 远端信号的同步精度达到0.22mrad。

In order to solve the problems of complicated equipment, large workload and low reliability when building a large frequency transmission network based on fiber link, a novel remote compensation system of frequency transmission was proposed. The system utilized wavelength division multiplexing (WDM) technology, to transmit the signal to the far end via the two branches, and the phase fluctuation was measured by the phase discrimination and correlation calculation, and the high-precision signal was obtained by electrical phase shifting compensation. Simulation results verify the effectiveness of the proposed method. The transmission of 10MHz signals over 25km optical fiber was simulated under the communication window of 1310nm and 1550nm, the synchronization accuracy of the remote signal reaches 0.22mrad.