Optical Timing Distribution System with Femtosecond Stability
Optical Timing Distribution System with Femtosecond Stability
复制标题
具有飞秒稳定性的光定时分配系统
DOI：
10.1002/tee.21824
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发表时间：
2012
影响因子：
1
通讯作者：
Hidemi Tsuchida
中科院分区：
文献类型：
--
作者：
Masaki Amemiya;Ken-ichi Watabe;Tomonari Suzuyama;Takashi Naito;Hidemi Tsuchida
稳定的定时分配是许多使用定时信号进行同步的领域的关键技术。定时信号的频率取决于场，有时需要多个定时信号。在我们基于DWDM的定时分配系统中，相位偏差通过高速往返信号（10 GHz信号用作此控制信号）检测。控制光纤拉伸器，以使控制信号的相位偏差最小化。多个信号和控制信号被密集地多路复用并通过相同的扩展器传输。因此，所有信号的传输都是稳定的。这种配置为分配各种RF或微波信号提供了灵活的平台。作为任意定时信号的示例，1 GHz信号在长度稳定的400 m光纤上传输超过1天。记录的传播时间波动分别为10.4和2.8 fs rms的1和10 GHz的信号。平均时间为105 s时，Allan偏差为2.7 × 10−19（1 GHz）和6.0 × 10−20（10 GHz）。© 2012日本电气工程师协会。由John Wiley & Sons公司出版
Stable timing distribution is a key technology for the many fields that use timing signals for synchronization. The frequency of the timing signal depends on the field and multiple timing signals are sometimes required. In our DWDM‐based timing distribution system, phase deviation is detected by high‐speed round‐trip signal (10 GHz signal is used as this control signal). Fiber stretchers are controlled so as to minimize the phase deviation of the control signal. Multiple signals and the control signal are densely multiplexed and transmitted through the same stretchers. Therefore, the transmission of all signals is stabilized. This configuration provides a flexible platform for distributing various RF or microwave signals. As an example of arbitrary timing signals, a 1 GHz signal is transmitted over a length‐stabilized 400‐m fiber for more than 1 day. The recorded propagation time fluctuations are 10.4 and 2.8 fs rms for the 1 and 10 GHz signals, respectively. The Allan deviations are 2.7 × 10−19(1 GHz) and 6.0 × 10−20(10 GHz) for the averaging time of 105s. © 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.