中文摘要：

研究一维周期排列共振放大介质的小信号增益特性．研究结果表明小信号增益随着作用长度的增加表现出异常的放大特性．在满足严格布拉格共振条件下，介质折射率分布形成的带隙和增益效应之间的相互竞争决定了透射光场的变化．进一步讨论了增益大小与激子参数和共振原子之间的依赖关系．

英文摘要：

The characteristics of small signal gain are studied in a one-dimensional periodically arranged amplifying media. It is proved that the small signal gain characteristics shows special features with the increase of gain material length. The variation in gain is determined by the mutual competition between the photonic band gap formed by the refractive index of amplifying media and gain reaction under the resonant Bragg condition. Furthermore, we investigated the gain on the parameters of excitons and resonant atoms.