强激光与粒子束2012，Vol.24Issue(2)：297-300,4.DOI:10.3788/HPLPB20122402.0297
XFEL飞秒同步与定时系统中光纤长度变化的数字化监测
Digital monitoring for length variation of optical fibers in femtosecond timing and synchronization system of XFEL
摘要
Abstract
The requirements for the femtosecond timing and synchronization (fs T&S) system in an X-ray free electron laser (XFEL) facility are analyzed.The timing/phase distribution method using optical fiber is adopted.Since the optical length of the fiber changes as the temperature drifts,the influence of temperature drift on the length variation of the fiber is studied in comparative experiments.An FPGA-based digital phase/amplitude detector is designed to record the data of the length variation.For a 100-meter-long fiber,the timing drift caused by length variation is 6 ps (peak-peak value) over 24 hours.The result shows the digital phase/amplitude detector could be used for length variation monitoring and stabilization of the fs T&S system.关键词
长度变化/数字化相位和幅度检测器/现场可编程门阵列/X射线自由电子激光/飞秒同步与定时Key words
length variation/digital phase/amplitude detector/FPGA/XFEL/femtosecond timing and synchronization分类
信息技术与安全科学引用本文复制引用
马新朋,裴国玺,刘波,王光伟,邱丰..XFEL飞秒同步与定时系统中光纤长度变化的数字化监测[J].强激光与粒子束,2012,24(2):297-300,4.基金项目
supported by the Knowledge Innovation Program of Chinese Academy of Sciences （）
