中文摘要：

在相控阵雷达中使用光纤实时延迟技术，可实现大角度瞬时宽带扫描。利用半导体光放大器和法拉第旋转镜实现了快速切换的延迟线，此技术具有切换速度快，延迟精度高，输出功率恒定，偏振不相关等优点。实验结果表明，此结构能够实现1ps的延时精度，误差不超过0．1ps。

英文摘要：

The fiber optic true delay technique can help to realize broadband and wide-angle scan in phased array antenna. Based on existing optical delay line （ODL） structures, it＇s implemented a new switching structure of ODL using semiconductor optical amplifiers （SOA） and Faraday rotation mirrors （FRM）. This structure has the advantages of fast tunability, high delay precision, stable output power, and polarization independence. The delay of this structure can be controlled at a precision of 1 ps with error of less than 0.1 ps.