基于宽谱光源的光控微波延时技术

提出一种新型的基于宽谱光源和色散器件结合的光控波束形成网络(OCBFN)方案,与利用独立激光器的方案进行了比较,给出了该方案的工作原理和延时链路理论分析,并通过实验验证了该方案实现光控延时的可行性。实验中利用掺铒光纤放大器(EDFA)作为宽谱光源,10 km单模光纤(SMF)作为色散器件实现光路延时,可调谐光滤波器选择光路的工作波长,利用矢量网络分析仪产生微波信号并测量信号延时特性,在9.25~10.25 GHz微波频段中,实验测得的系统延时范围、延时精度及真延时特性(延时大小与微波信号频率无关)验证了基于宽谱光源的可调谐光控微波延时方案的可行性。

Optical Controlled Microwave Time Delay Technology Based on Broad Band Optical Source

A novel optical controlled beam forming network (OCBFN) scheme based on broad band optical source and dispersion device is presented and compared with traditional scheme based on laser diode (LD). The principle of this scheme is illustrated by theoretical analysis and the feasibility is validated by experiment. In experiment, Er-doped fiber amplifier (EDFA) is used as broad band optical source, 10 km single mode fiber (SMF) is used as dispersion device for time delay, tuneable optical filter is used to choose operation wavelength, and vector network analyzer is used to generate microwave signal and measure the time delay performance. In 9.25～10.25 GHz microwave band, system time delay range, time delay precision and true time delay performance are measured, and the feasibility of the OCBFN scheme based on broad band optical source is verified by the experiment results.