中文摘要：

本文研究了宽频脉冲光在电磁诱导透明介质中的传播特性.结果表明,如果信号光的载波频率在透明窗口内,且频宽相对于透明窗口较宽时,输出信号光的时域宽度展宽,并出现明显的延迟效应;如果信号光的载波频率在介质吸收峰内,且频宽远大于介质吸收峰线宽时,信号光在传播过程中会发生形变,输出信号出现两个峰,峰值依赖于耦合光的频率和光强以及样品的长度,在适当条件下,在输出信号光中可获取较强的时域窄化的光脉冲.

英文摘要：

The propagation of broadband pulse in a medium with electromagnetically induced transparency（EIT） was studied.The results show that if the carrier frequency of pulse is exactly tuned to the center of the transparency window,and the pulse spectrum is broader than transparency window,the pulse is temporally broadened and the delay effect is significant.If the carrier frequency of pulse the is exactly tuned to the region of absorption,and the pulse spectrum is wide with respect to the width of absorption line,the pulse begins to distort after a certain distance and is split into two parts at last.The peak value depends not only on the frequency and intensity of the coupling field,but also on the length of the sample.Under appropriate conditions,strong and time domain narrowed pulse can be obtained in the output light.