Bragg型声光双稳系统分岔状态的性质研究  

Study on Small Signals Amplification by an Acoustooptic Bistable System Operating in Bragg Region

作　　者：黄力群[1] 简伟[1] 魏道平[1] 张劲松[1] 简水生[1] 

机构地区：[1]北方交通大学光波技术研究所,北京100044

出　　处：《铁道学报》1999年第5期67-69,共3页Journal of the China Railway Society

摘　　要：从理论上研究了Ｂｒａｇｇ型声光双稳系统在分岔状态下对弱信号的放大作用，对描述该系统的差分微分方程进行的数值模拟计算表明，声光双稳系统与小信号之间存在着很强的耦合作用，在靠近分岔点处小信号的幅值被放大了２６ 倍。而且计算表明，声光双稳系统在周期２ 解区间内同样能放大小信号。In this paper, a theoretical investigation has been undertaken to study the amplification of small signals by an acoustooptic bistable system operating in the Bragg region. Numerical solutions of the difference differential equation show that a strong coupling occurs between small signals and the acoustooptic bistable system. Near the first bifurcation point, an amplification multiple of 26 is obtained. Moreover, the calculation results indicate that the bistable system can amplify small signals too in the period two solution region.

关 键 词：声光双稳系统 弱信号 Bragg型 

分 类 号：TN91[电子电信—通信与信息系统]