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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。
A novel OCBFN scheme based on the combination of a broad spectrum light source and a dispersive device is proposed, which is compared with a scheme using independent lasers. The working principle and theoretical analysis of the delay chain are given. The feasibility of this scheme to realize the light control delay is verified through experiments. In the experiment, EDFA is used as a wide-spectrum light source, 10 km single-mode fiber (SMF) is used as the dispersion device to achieve the optical path delay, the tunable optical filter selects the working wavelength of the optical path, and the vector network analyzer generates the microwave signal And measure the delay characteristics of the signal. The experimentally measured system delay range, delay accuracy and true delay characteristics (the delay size has nothing to do with the microwave signal frequency) in the 9.25-10.25 GHz microwave band validated that based on the wide-spectrum light source Feasibility of tunable optical control microwave delay scheme.