基于PID反馈控制的光载射频稳相传输技术

Phase stabilized transmission over optical fiber link based on PID feedback control

摘要:

针对光纤时频传输过程中由于温度、压力变化等环境因素导致的相位抖动，提出了一种基于比例-积分-微分(PID)反馈控制的高精确度相位稳定纠正技术。采用迈克耳逊干涉仪进行实时相位检测，并通过压电陶瓷进行实时补偿，能够有效克服传统鉴相、延时线等在补偿精确度和速度方面的瓶颈。经过对环境因素的计算与PID补偿仿真，得到该方法在800 m光纤传输的传输延时测量精确度为2.2 fs，传输延时稳定度<8.8 fs，在小于100 N的外界轴向拉力作用下，恢复初始状态的时间在0.088 s以内。

Abstract:

Aiming at the phase jitter caused by environmental factors such as temperature and vibration changes in the process of optical fiber time-frequency transmission, a high-precision phase stability stress technology based on Proportional-Integral-Derivative(PID) feedback control is proposed. Michelson interferometer is employed for real-time phase detection. The real-time compensation is carried out through piezoelectric ceramics. This method can effectively overcome the bottleneck in compensation accuracy and speed of traditional phase discrimination and delay line. After calculation of environmental factors and PID compensation simulation, the transmission delay measurement accuracy of this method in 800 m optical fiber transmission is 2.2 fs, the transmission delay stability is <8.8 fs, and the initial state time is within 0.088 s under the external axial tension less than 100 N.