基于射频光子技术的时间频率传递系统设计与实现

Design and implementation of time and frequency transfer system based on RF photonics technology

为解决传统时间频率方法难以满足未来高精度时频传递需求的问题,设计并实现了一套基于射频光子技术的时间频率传递系统。分析了链路噪声、光纤色散、非线性以及环境温度波动对频率信号光纤传递链路的影响,测试结果表明:开环的射频光子链路会恶化所传递频率信号的长期稳定度,而采用校准信号主动反馈的闭环传递方式比开环链路的阿伦标准偏差提高了一个量级。

In order to solve the problem that the traditional time frequency method can not meet the demand of high precision time frequency transmission in the future. A time and frequency transfer system based on RF photonic technology is designed and implemented. The effects of link nosie, fiber dispersion, nonlinearity and ambient temperature fluctuation on RF photonic links are analyzed. The test results show that the open loop of RF photonic link will deteriorate the long-term stability of frequency signal, and the Allan standard deviation of adopting active calibration signal feedback closed loop transmission way than open loop link raised an or- der of magnitude.