Flat broadband chaotic carrier generation and synchronization

被引：8
|
作者：
Zhang Xiu-Juan [1 ]
Wang Bing-Jie [1 ]
Yang Ling-Zhen [1 ]
Wang An-Bang [1 ]
Guo Dong-Ming [1 ]
Yun-Cai, Wang [1 ]
机构：
[1] Taiyuan Univ Technol, Dept Phys, Coll Sci, Taiyuan 030024, Peoples R China
来源：
ACTA PHYSICA SINICA | 2009年 / 58卷 / 05期
基金：
中国国家自然科学基金;
关键词：
chaos synchronization; unidirectional fiber ring; optical feedback; semiconductor laser; OPTICAL FEEDBACK; LASER-DIODE;
D O I：
10.7498/aps.58.3203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The chaotic carrier with smooth spectrum and broad bandwidth is generated by a distributed feedback (DFB) semiconductor laser subject to unidirectional fiber ring optical feedback. The smooth spectrum of the obtained chaotic carrier hides the external cavity resonance frequency peak, therefore the security of the system is enhanced. By unidirectional coupling, we implement the stable chaos synchronization when the chaotic light is injected into a solitary DFB laser diode. The correlation coefficient of synchronization is 0.84. The effects of injection strength and optical frequency detuning on synchronization are investigated experimentally. The results show that in conditions of strong injected locking the synchronization can be achieved in a large range of frequency detuning, and the stronger injection corresponds to the larger range of frequency detuning in which chaos synchronization maintains. The synchronization quality improves with the injection strength increasing.
引用
收藏
页码：3203 / 3207
页数：5
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