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提出并实验验证了一个四通道的基于啁啾光栅的连续可调光控延时系统,该系统适合于频率达10GHz的相控阵天线的波束形成及扫描,使用一种基于啁啾光栅的延时网络和一种新型的波长等间隔增大或减小的多波长可调谐线性腔光纤激光器。光纤激光器的等波长间隔,通过相等增量的作用力挤压或拉伸激光谐振器中固定在一个有机塑料盘上成一定的角度相邻的布拉格光栅来调谐。光控延时是通过被调制光在一个线性啁啾光栅的不同位置反射而实现,波长等间隔激光可获得等间隔的延时。
A four-channel chirp gratings-based continuously adjustable optical control delay system is proposed and experimentally verified. The system is suitable for beamforming and scanning of phased array antennas with frequency up to 10 GHz. A chirp grating-based delay Time network and a novel multi-wavelength tunable linear cavity fiber laser with equal or no increase or decrease of wavelength. The equal-wavelength spacing of fiber lasers is tuned by squeezing or stretching the Bragg gratings in the laser resonator at an angle that is fixed to an organic plastic disk by equal incremental forces. Light control delay is achieved by reflecting the modulated light at different positions of a linear chirped grating, and the equal-interval lasers can obtain equal-interval delay.