XNOR门
光学
带宽(计算)
宽带
物理
计算机科学
光学混沌
非线性系统
光电子学
混乱的
信号(编程语言)
激光器
半导体激光器理论
电信
晶体管
电压
量子力学
人工智能
程序设计语言
作者
Hanwen Luo,Mengfan Cheng,Chuanming Huang,Bolin Ye,Weidong Shao,Lei Deng,Qi Yang,Minming Zhang,Deming Liu
出处
期刊:Optics Letters
[The Optical Society]
日期:2021-09-14
卷期号:46 (18): 4654-4654
被引量:5
摘要
We experimentally investigated a novel broadband optoelectronic chaos generation scheme. The proposed system is achieved by adopting the highly nonlinear operation of an electro-optical exclusive-NOR (XNOR) logic gate and two delayed feedback loops that refer to the Boolean chaos model. The XNOR gate is established by a commercial use inphase and quadrature-phase (IQ) modulator that works at a specific bias point. The resulting power spectrum of the broadband chaos signal extends from DC to 29.1 GHz (10 dB bandwidth), and the probability density distribution is Gaussian distribution like. Owing to the strong nonlinearity of XNOR operation, the conditions to enter the chaos region are more relaxed compared to traditional optoelectronic oscillator (OEO) chaos systems, and the time delay signature (TDS) of the feedback loop is also suppressed. Moreover, to further enhance the performance of the generated chaos signal, we injected the optoelectronic chaotic signal into a semiconductor laser. Experimental results indicate that after the cascade optical injection, the bandwidth of the output chaos signal is extended to 38.4 GHz and the TDS is completely concealed; meanwhile, a perfect Gaussian distribution can be obtained.
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