25km光纤链路高精度频率传输实验研究

发布时间：2018-04-09 03:03

本文选题：频率传输　切入点：时延抖动　出处：《光电子·激光》2016年03期

【摘要】：分析了影响光纤频率传输精度的主要因素,设计并实现了一种新的基于锁相环(PLL)补偿的双向异频传输方案。首先,为了确定光纤链路引入的不稳定性,设计了恒温条件下链路稳定性测试方案,通过光电联合测试得出了链路传输指标;然后,结合环境温度及PLL对光纤频率传输的影响,设计了环境温度影响下链路时延稳定性测试方案,并搭建了实验平台;最后,进行了光纤传输实验,分析了环境温度和阻尼系数变化对传输性能的影响。结果表明,由于PLL的有效补偿,10 MHz高精度原子钟频率信号经过25km的光纤传输后仍能保持很高的稳定性;本文方案下的链路时延抖动在环境温度慢变时可以稳定在0.5ns以内,显著降低了实际光纤应用中传输时延的不稳定性。
[Abstract]:This paper analyzes the main factors that affect the accuracy of fiber frequency transmission, and designs and implements a new bidirectional different frequency transmission scheme based on phase-locked loop (PLL) compensation.First of all, in order to determine the instability of optical fiber link, the test scheme of link stability under constant temperature is designed, and the link transmission index is obtained by photoelectric joint test. Then, considering the influence of environment temperature and PLL on fiber frequency transmission,The test scheme of link delay stability under the influence of ambient temperature is designed, and the experimental platform is built. Finally, the fiber transmission experiment is carried out, and the influence of the change of ambient temperature and damping coefficient on the transmission performance is analyzed.The results show that the high precision atomic clock frequency signal of 10 MHz can be transmitted through the optical fiber of 25km because of the effective compensation of PLL, and the link delay jitter in this scheme can be stabilized within 0.5ns when the ambient temperature changes slowly.The instability of transmission delay in practical fiber applications is significantly reduced.
【作者单位】：空军预警学院;航天飞行动力学技术重点实验室;
【基金】：航天飞行动力学技术重点实验室开放基金(2013afdl009)资助项目
【分类号】：TN253

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