双反馈半导体激光器的混沌特性研究  

Chaos characteristics of the semiconductor laser with double external cavity optical feedback

作　　者：赵严峰[1] 

机构地区：[1]黄淮学院电子科学与工程系,驻马店463000

出　　处：《物理学报》2009年第9期6058-6062,共5页Acta Physica Sinica

摘　　要：实验利用双反馈半导体激光器获得了关联维数为3.8的高维混沌光.同时对比分析了双反馈与单反馈两种不同模式产生混沌的区别.结果表明:在反馈强度均为-26 dB时,双反馈产生混沌的关联维数高于单反馈产生混沌的关联维数2.6;双反馈可获得带宽为11 GHz的混沌光,为单反馈产生混沌带宽5.5 GHz的两倍.当双反馈的两个外腔长度不相等时,混沌的自相关曲线能很好的隐藏外腔长度信息,可提高混沌通信的保密性.The chaos characteristics of a DFB semiconductor laser subjected to single and double external cavity optical feedback are analyzed experimentally. The results show that the correlation dimension, bandwidth of the chaos generated by one external cavity optical feedback can be expanded by using double external cavity optical feedback. When the laser is subjected to double external cavity optical feedback, the bandwidth with one external cavity feedback is increased from 5.5 GHz to 11 GHz. Correspondingly, the correlation dimension is increased from 2.8 to 3.6. The information of the external cavity length of the chaos generated by double external cavity optical feedback can be masked in the autocorrelation function.

关 键 词：双反馈 半导体激光器 混沌 带宽 

分 类 号：TN248.4[电子电信—物理电子学] TQ051.13[化学工程]