基于光纤环形网的多点高精度时频传递方法
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摘要
研究了基于光纤环形网的多点高精度时频传递的方法,提出了终端站对钟差自感知的方案,将对钟差的感知测量以及补偿转移到终端站执行,实现网络中各个终端站与中心站的时频同步。搭建了长度为100 km的光纤环形网多点时频传递系统,实验研究了链路中色散带来的不对称性偏差的校消方法,验证了链路温度变化下的多点时频传递性能,测量的时频传递同步误差的峰峰值低于400 ps,均方根误差小于60 ps,表明终端站可以在光纤环形网的任意位置灵活接入。
We study a ring fiber network based multipoint time-frequency dissemination method with high precision. Further, a novel scheme that can realize self-perception for clock difference is proposed; the sensing measurement and compensation for the clock difference are located at remote stations. Time-frequency synchronization can be achieved between the remote stations and the local station. Subsequently, we perform a time-frequency dissemination experiment via a 100-km ring fiber network to study the correction method of asymmetry deviation introduced by dispersion. The multipoint time-frequency dissemination performance is verified under link temperature variation. The measured peak-to-peak value of synchronization error of time-frequency dissemination is smaller than 400 ps, and the root mean square error is smaller than 60 ps. The results show that the remote stations can be accessed anywhere in the ring fiber network.
We study a ring fiber network based multipoint time-frequency dissemination method with high precision. Further, a novel scheme that can realize self-perception for clock difference is proposed; the sensing measurement and compensation for the clock difference are located at remote stations. Time-frequency synchronization can be achieved between the remote stations and the local station. Subsequently, we perform a time-frequency dissemination experiment via a 100-km ring fiber network to study the correction method of asymmetry deviation introduced by dispersion. The multipoint time-frequency dissemination performance is verified under link temperature variation. The measured peak-to-peak value of synchronization error of time-frequency dissemination is smaller than 400 ps, and the root mean square error is smaller than 60 ps. The results show that the remote stations can be accessed anywhere in the ring fiber network.
引文
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[15]Krehlik P,Schnatz H,■liwczyński ■.A hybrid solution for simultaneous transfer of ultrastable optical frequency,RF frequency,and UTC time-tags over optical fiber[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2017,64(12):1884-1890.
[16]Priyanka E B,Maheswari C,Meenakshipriya B.Parameter monitoring and control during petrol transportation using PLC based PID controller[J].Journal of Applied Research and Technology,2016,14(2):125-131.
[17]Dai J K,Jiang H M,Zhong Q R,et al.LDtemperature control system based on self-tuning fuzzy PID algorithm[J].Infrared and Laser Engineering,2014,43(10):3287-3291.戴俊珂,姜海明,钟奇润,等.基于自整定模糊PID算法的LD温度控制系统[J].红外与激光工程,2014,43(10):3287-3291.
[18]Fujieda M,Kumagai M,Gotoh T,et al.Ultrastable frequency dissemination via optical fiber at NICT[J].IEEE Transactions on Instrumentation and Measurement,2009,58(4):1223-1228.
[19]Palmer R K,Blue T E.Modulation transfer function for distributed temperature measurements using an optical fiber sensor system[J].IEEE Sensors Journal,2018,18(5):1911-1918.
[2]′Sliwczyński,Krehlik P,Czubla A,et al.Dissemination of time and RF frequency via a stabilized fibre optic link over a distance of 420km[J].Metrologia,2013,50(2):133-145.′S
[3]Li X Y,Zhu Y,Lu L,et al.Study on high precision disciplined time-frequency transferring experiments through optical fiber link[J].Acta Optica Sinica,2014,34(5):0506004.李晓亚,朱勇,卢麟,等.高精度光纤时频伺服传递实验研究[J].光学学报,2014,34(5):0506004.
[4]Zhu X,Wang B,Guo Y C,et al.Robust fiber-based frequency synchronization system immune to strong temperature fluctuation[J].Chinese Optics Letters,2018,16(1):010605.
[5]Zhu X,Wang B,Gao C,et al.Fiber-based multipleaccess frequency synchronization via 1f-2fdissemination[J].Chinese Physics B,2016,25(9):090601.
[6]Krehlik P,■liwczyński ■,Buczek ■,et al.Multipoint dissemination of RF frequency in fiber optic link with stabilized propagation delay[J].IEEETransactions on Ultrasonics,Ferroelectrics,and Frequency Control,2013,60(9):1804-1810.
[7]Chen W,Liu Q,Cheng N,et al.Joint time and frequency dissemination network over delay-stabilized fiber optic links[J].IEEE Photonics Journal,2015,7(3):7901609.
[8]Wang J L,Chen W,Liu Q,et al.Ultrastable multiclock frequency injection and dissemination in a ring fiber network[J].IEEE Photonics Journal,2017,9(2):7201107.
[9]Jiang Z Z,Dai Y T,Zhang A X,et al.Precise time delay sensing and stable frequency dissemination on arbitrary intermediate point along fiber-optic loop link with RF phase locking assistance[J].IEEE Photonics Journal,2015,7(2):7200809.
[10]Yang X H,Zhai H S,Hu Y H,et al.Study on GPSdisciplined Rb clock based on new frequency accuracy measurement algorithm[J].Chinese Journal of Scientific Instrument,2005,26(1):41-44.杨旭海,翟惠生,胡永辉,等.基于新校频算法的GPS可驯铷钟系统研究[J].仪器仪表学报,2005,26(1):41-44.
[11]Zhao X Y,Lu L,Zhu Y,et al.Design and realization of disciplining time automatically in remote module of the optical fiber time transfer system[J].Optical Communication Technology,2018,42(8):10-13.赵晓宇,卢麟,朱勇,等.光纤时间传递系统中终端站自主伺服的设计实现[J].光通信技术,2018,42(8):10-13.
[12]Yu L Q,Lu L,Wang R,et al.Analysis of the Sagnac effect and its influence on the accuracy of time transfer system by the optical fiber[J].Acta Optica Sinica,2013,33(3):0306003.于龙强,卢麟,王荣,等.Sagnac效应对光纤时间传递精度的影响分析[J].光学学报,2013,33(3):0306003.
[13]Jiang S P,Zhang H,Jiang W N,et al.Noise analysis for BTDM-based fiber-optic time transfer link[J].Journal of Optoelectronics·Laser,2017,28(6):596-604.江少平,张浩,姜文宁,等.双向时分复用光纤时间传递链路噪声分析[J].光电子·激光,2017,28(6):596-604.
[14]Krehlik P,■liwczyński ■,Buczek ■,et al.ELSTAB:fiber-optic time and frequency distribution technology:a general characterization and fundamental limits[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2016,63(7):993-1004.
[15]Krehlik P,Schnatz H,■liwczyński ■.A hybrid solution for simultaneous transfer of ultrastable optical frequency,RF frequency,and UTC time-tags over optical fiber[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2017,64(12):1884-1890.
[16]Priyanka E B,Maheswari C,Meenakshipriya B.Parameter monitoring and control during petrol transportation using PLC based PID controller[J].Journal of Applied Research and Technology,2016,14(2):125-131.
[17]Dai J K,Jiang H M,Zhong Q R,et al.LDtemperature control system based on self-tuning fuzzy PID algorithm[J].Infrared and Laser Engineering,2014,43(10):3287-3291.戴俊珂,姜海明,钟奇润,等.基于自整定模糊PID算法的LD温度控制系统[J].红外与激光工程,2014,43(10):3287-3291.
[18]Fujieda M,Kumagai M,Gotoh T,et al.Ultrastable frequency dissemination via optical fiber at NICT[J].IEEE Transactions on Instrumentation and Measurement,2009,58(4):1223-1228.
[19]Palmer R K,Blue T E.Modulation transfer function for distributed temperature measurements using an optical fiber sensor system[J].IEEE Sensors Journal,2018,18(5):1911-1918.