光纤通信网中波长选择开关的时频传递性能
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摘要
为了适应高精度光纤时频传递与光纤通信网融合的发展趋势,对光纤通信网中常用的波长选择开关(WSS)的时频传递性能进行了研究。基于波分复用、单纤双向还回和光学真时延补偿的方案搭建了一套高精度光纤时频传递系统,研究了WSS的输出端口、输出损耗和输入光信号的偏振态变化对时频传递性能的影响,并在此基础上研究了含WSS的时频传递系统的开闭环特性以及闭环情况下WSS的动态切换对时频传递系统的影响。实验结果表明,WSS的引入对光纤时频传递性能的影响是可以控制的,证实了在含WSS的商用光纤通信网中进行高精度时频传递是可行的。
To adapt to the development trend of combining high precision fiber time-frequency transfer with optical fiber communication network,the time-frequency transfer performance of wavelength selection switch(WSS)which is commonly used in optical fiber communication network is studied.A system with high precision fiber timefrequency transfer is established based on the wavelength division multiplexing,bidirectional return and optical real time delay compensation scheme.The effects of output ports,output loss and variation of polarization state of input optical signal on the time-frequency transfer performance of the system are discussed.In addition,the open-loop and closed-loop performance of time-frequency transfer system including WSS and the influence of dynamic switching performance of WSS under closed-loop on the time-frequency transfer system are studied.The experimental resultsshow that the effect of WSS on the fiber time-frequency transfer performance can be controlled,and it is proved that the high precision time-frequency transfer in the commercial optical fiber communication network with WSS is feasible.
To adapt to the development trend of combining high precision fiber time-frequency transfer with optical fiber communication network,the time-frequency transfer performance of wavelength selection switch(WSS)which is commonly used in optical fiber communication network is studied.A system with high precision fiber timefrequency transfer is established based on the wavelength division multiplexing,bidirectional return and optical real time delay compensation scheme.The effects of output ports,output loss and variation of polarization state of input optical signal on the time-frequency transfer performance of the system are discussed.In addition,the open-loop and closed-loop performance of time-frequency transfer system including WSS and the influence of dynamic switching performance of WSS under closed-loop on the time-frequency transfer system are studied.The experimental resultsshow that the effect of WSS on the fiber time-frequency transfer performance can be controlled,and it is proved that the high precision time-frequency transfer in the commercial optical fiber communication network with WSS is feasible.
引文
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[2]Macias-Valadez D,Santerre R,LaRochelle S,et al.GPS-over-fiber architecture with relative cable delay monitoring for high precision GPS applications[C]//Proceedings of the 22nd International Technical Meeting of the Satellite Division of the Institute of Navigation,2009:622-634.
[3]Bloom B J,Nicholson T L,Williams J R,et al.An optical lattice clock with accuracy and stability at the10-18level[J].Nature,2014,506(7486):71-75.
[4]Rost M,Piester D,Yang W,et al.Time transfer through optical fibres over a distance of 73km with an uncertainty below 100ps[J].Metrologia,2012,49(6):772-778.
[5]Chen W,Cheng N,Liu Q,et al.High precision time and frequency transfer on 275 km Beijing-Shanghai fiber backbone[J].Chinese Journal of Lasers,2016,43(7):0706001.陈炜,程楠,刘琴,等.275km京沪线光纤干线高精度时频传递研究[J].中国激光,2016,43(7):0706001.
[6]Liu Q,Han S L,Wang J L,et al.High precise frequency transfer over a 430 km fiber backbone network using cascaded system[J],Chinese Journal of Lasers,2016,43(9):0906001.刘琴,韩圣龙,王家亮,等.采用级联方式实现430km高精度频率传递[J].中国激光,2016,43(9):0906001.
[7]Liu Q,Chen W,Xu D,et al.Simultaneous frequency transfer and time synchronization over a cascaded fiber link of 230km[J].Chinese Journal of Lasers,2016,43(3):0305006.刘琴,陈炜,徐丹,等.采用级联方式在230km光纤链路中同时实现频率传递和时间同步[J].中国激光,2016,43(3):0305006.
[8]Yang F,Xu D,Liu Q,et al.Accurate transmission of time and frequency signals over optical fibers based on WDM and two way optical compensation techniques[C].IEEE Lasers and Electro-Optics Conference,2013:14392674.
[9]Chen W,Xu D,Cheng N,et al.Fiber based radio frequency dissemination scheme to multiple users[C]//China Satellite Navigation Conference(CSNC)2015Proceedings,2015:379-386.
[10]Krehlik P,Sliwczynski,Buczek,et al.Fiberoptic joint time and frequency transfer with active stabilization of the propagation delay[J].IEEETransactions on Instrumentation and Measurement,2012,61(10):2844-2851.
[11]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.
[12]Accurate time and frequency comparison and dissemination through optical telecommunication networks[EB/OL].[2017-07-07]http://www.ptb.de/emrp/neatft_home.html.
[13]Amoozegar F,Paal L,Layland J,et al.Uplink array system of antennas for the deep space network[C].2004IEEE Aerospace Conference,2004,2:8274213.
[14]Zong L,Huang X D,Wang T,et al.A novel tunable DeMUX/MUX solution for WSS-based ROADM and WXC nodes[C].IEEE Optical Fiber Communication and the National Fiber Optic Engineers Conference,2007:9682536.
[15]Wall P,Colbourne P,Reimer C,et al.WSSswitching engine technologies[C].Optical Fiber Communication Conference,2008:OWC1.
[16]Baxter G,Frisken S,Abakoumov D,et al.Highly programmable wavelength selective switch based on liquid crystal on silicon switching elements[C].IEEEOptical Fiber Communication Conference,2006:8977555.
[17]Luo D T.Research of wavelength selective switch based on LCOS[D].Wuhan:Huazhong University of Science and Technology,2015.杨东堂.基于LCOS波长选择开关的研究[D].武汉:华中科技大学,2015.
[18]Wan Z W.Research on wavelength selective switch based on MEMS technology[D].Wuhan:Huazhong University of Science and Technology,2011.宛政文.基于MEMS技术的波长选择开关研究[D].武汉:华中科技大学,2011.
[19]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时延研究[J].光学学报,2014,34(5):0506004.
[20]Cheng N,Chen W,Liu Q,et al.Time synchronization technique for joint time and frequency transfer via optical fiber[J].Chinese Journal of Lasers,2015,42:0705002.程楠,陈炜,刘琴,等.光纤时间频率同时传递系统中时间同步方法的研究[J].中国激光,2015,42(7):0705002.
[21]Cheng N,Chen W,Liu Q,et al.Feedback control system of electro-optic modulator used for transferring one pulse per second[J].Chinese Journal of Lasers,2015,42(9):0905002.程楠,陈炜,刘琴,等.应用于秒脉冲传递的电光调制器反馈控制系统[J].中国激光,2015,42(9):0905002.