Wideband fiber-optic delay line with dynamic delay drift compensation
Wideband fiber-optic delay line with dynamic delay drift compensation
复制标题
具有动态延迟漂移补偿的宽带光纤延迟线
DOI：
10.1002/mop.29047
复制
发表时间：
2015
影响因子：
1.5
通讯作者：
Wang Hui
中科院分区：
文献类型：
--
作者：
Qi Xiaoqiong;Xie Liang;Wang Hui
本文演示了一种基于自制分布式反馈（DFB）激光器的宽带高分辨率光纤延迟线系统，其中使用标准单模光纤（SMF）的可扩展性补偿了由于温度变化引起的延迟时间漂移。采用幅值带宽为18 GHz、带内相位方差在60°以内的DFB激光器作为光源，提供宽带微波信号延迟。在SMF延迟线中测量到的温度依赖性延迟方差高达42.8 ps/km/°C。光纤拉伸器作用于电机驱动的300 m SMF，可达到600 ps的补偿能力。该系统不仅为环境敏感系统提供了延时漂移补偿，而且为稳定系统实现延时连续整定提供了可行的解决方案。使用更长的拉伸光纤可以进一步扩大微波延迟的可调范围。©2015 Wiley期刊公司微波工程学报，2015,37 (7):1219 - 1222
A wideband and high resolution fiber delay line system based on a self‐fabricated distributed‐feedback (DFB) laser is demonstrated in this article, where the delay time drift due to temperature variance is compensated using the extensibility of the standard single‐mode fiber (SMF). The DFB laser with the amplitude bandwidth of 18 GHz and the in‐band phase variance within 60° is applied as the optical source to provide wideband microwave signal delay. The temperature‐dependence delay variance is measured up to 42.8 ps/km/°C in SMF delay line. A compensation capability of 600 ps is reached with a fiber stretcher acted on a motor‐driven 300 m SMF. The proposed system not only provides delay drift compensation for the environmental‐sensitive systems, but also a feasible solution to realize continuously tuning of delay for stable systems. The tunable range of the microwave delay could be further extended using longer stretched fiber. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1219–1222, 2015