| 面向XFEL的km级光纤链路的fs精度时钟分布 |
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| 引用本文： | 马春阳,宋有建,刘新宇,李晶,刘友永,胡明列,王清月.面向XFEL的km级光纤链路的fs精度时钟分布[J].强激光与粒子束,2016,28(5):055102. |
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| 作者姓名： | 马春阳 宋有建 刘新宇 李晶 刘友永 胡明列 王清月 |
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| 作者单位： | 1.天津大学 精密仪器与光电子工程学院, 光电信息技术科学教育部重点实验室, 天津 300072; |
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| 摘 要： | 报道了一种基于光纤链路的飞秒精度的时钟分布方案。一台被动锁模的光纤飞秒激光器输出的超短脉冲序列作为主时序，通过2 km的普通单模光纤链路分发，利用平衡光学互相关技术探测传输中积累的时钟延迟误差，由光纤拉伸器和步进电机相结合在本地主动补偿，在2 h内的时钟分布稳定度优于10-18，时钟延迟标准差为1.1 fs。
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| 关 键 词： | 飞秒激光 时钟同步 X射线自由电子激光器 平衡光学互相关 光纤链路 |
| 收稿时间： | 2015-11-02 |
Femtosecond precision timing distribution over km level stabilized fiber link for application in XFEL |
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| Institution: | 1.Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education,School of Precision Instruments and Opto-electronics Engineering,Tianjin University,Tianjin 300072,China;2.Remote Control and Telemetry Division,The 54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050081,China |
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| Abstract: | This paper demonstrates a fiber link based timing distribution with femtosecond precision. The output femtosecond laser pulse train from a passively mode-locked fiber laser serves as master clock, which is distributed over a 2 km single mode fiber link. A balanced optical cross-correlator (BOC) is used to monitor the accumulated timing error, which is actively compensated by a local fiber stretcher and a step motor. The standard deviation of the residual timing error is less than 1.1 fs over 2 h observation, and the time stability is better than 10-18. |
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