用表声器件及分布参数传输线等传统技术制成的延迟线不能满足长时延与宽带方面的要求。通信技术中使用的光纤,由于其低耗与宽带特性,能较好地满足这种要求。本文介绍所研制的光纤延迟线由半导体激光器、极化器、集成电光调制器、单模光纤及光电检测器组成。工作频率为500～1000MHz,激光波长为1.3μm,用约8.7km的光纤产生约43μs的时延。除了按常规方法测试了系统的指标外,还研究了用自动网络分析仪快速精确测量系统色散的方法,其中包括克服系统因直接泄漏产生的测量误差。最后给出该光纤延迟线主要技术指标的测量结果。这种延迟线在宽带雷达、滤波器、波束形成等领域会有广泛的应用前景。 Delay lines made with conventional techniques such as acoustic devices and distributed parameter transmission lines do not meet the requirements of long delays and broadband. Optical fiber used in communication technology, because of its low consumption and broadband characteristics, can better meet this requirement. This article describes the development of the fiber delay line by the semiconductor lasers, polarizers, integrated electro-optic modulator, single-mode fiber and photodetector components. Working frequency is 500 ~ 1000MHz, laser wavelength is 1.3μm, with about 8.7km optical fiber to produce a delay of about 43μs. In addition to testing the system’s specifications by conventional methods, a method of quickly and accurately measuring system dispersion using automated network analyzers has also been investigated, including overcoming the measurement error of the system due to direct leakage. Finally, the measurement results of the main technical specifications of the fiber delay line are given. This kind of delay line will have broad application prospects in the fields of wideband radar, filter, beamforming and so on.