中文摘要：

减慢速度并且在纤维控制光脉搏的时间延期在光通讯系统的许多潜在的应用，和很多理论、试验性的研究被做了。在这份报纸，传播光谱和活跃纤维布拉格的反射光谱，栅栏(FBG ) couplers 被学习，并且分散的分析表情和时间延期被获得。由改变 detuning 和获得系数，在活跃纤维布拉格栅栏 coupler 的不同分散和时间延期被获得。不同 detunings 和获得系数能导致各种各样的时间延期的结果表演，和这样悦耳的时间延期能被改变信号频率或获得系数完成。

英文摘要：

Slowing down velocity and controlling time delay of optical pulses in fiber have many potential applications in optical communication systems, and a number of theoretical and experimental studies have been done. In this paper, the transmission spectrum and reflective spectrum of active fiber Bragg grating （FBG） couplers are studied, and the analytic expressions of dispersion and time delay are obtained. By changing the detuning and gain coefficient, different dispersions and time delays in active fiber Bragg grating coupler are obtained. The results show that different detunings and gain coefficients can result in various time delays, and thus tunable time delay could be achieved by changing signal frequency or gain coefficient.