Critical dispersion of chirped fiber Bragg grating for eliminating time delay signature of distributed feedback laser chaos

被引:0
|
作者
Wang, Da-Ming [1 ]
Lei, Yi-Hang [1 ]
Shi, Peng-Fei [1 ]
Li, Zhuang-Ai [2 ]
机构
[1] Shanxi Univ Finance & Econ, Sch Informat, Taiyuan 030006, Shanxi, Peoples R China
[2] Commun Univ Shanxi, Sch Informat Engn, Jinzhong 030619, Peoples R China
基金
中国国家自然科学基金;
关键词
chaos; semiconductor laser; time delay signature; chirped fiber Bragg grating (CFBG); RANDOM BIT GENERATION; SEMICONDUCTOR-LASER; OPTICAL FEEDBACK; SUPPRESSION; KEY; SYNCHRONIZATION;
D O I
10.1088/1674-1056/acddce
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Optical chaos has attracted widespread attention owing to its complex dynamic behaviors. However, the time delay signature (TDS) caused by the external cavity mode reduces the complexity of optical chaos. We propose and numerically demonstrate the critical dispersion of chirped fiber Bragg grating (CFBG) for eliminating the TDS of laser chaos in this work. The critical dispersion, as a function of relaxation frequency and bandwidth of the optical spectrum, is found through extensive dynamics simulations. It is shown that the TDS can be eliminated when the dispersion of CFBG is above this critical dispersion. In addition, the influence of dispersive feedback light and output light from a laser is investigated. These results provide important quantitative guidance for designing chaotic semiconductor lasers without TDS.
引用
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页数:5
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