Erbium-doped fiber ring laser dynamical analysis for chaos message masking scheme

被引:5
作者
Ali, S. Zafar [1 ]
Islam, M. Khawar [2 ]
机构
[1] Air Univ, Dept Elect Engn, E-9, Islamabad, Pakistan
[2] Taibah Univ, Dept Elect Engn, Al Madinah Al Munawarah, Saudi Arabia
关键词
erbium-doped fiber ring laser chaos; optical chaos; chaos message masking; Lyapunov exponent; secure optical communication; MODULATION;
D O I
10.5277/oa170306
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A detailed dynamical analysis of erbium-doped fiber ring laser cavity loss configuration for the chaos message masking scheme is carried out to optimize the generation of high quality chaos. A threefold increase in Lyapunov exponent implying higher security, and a significant increase in chaos bandwidth is achieved, both ideal for secure optical communication and nonlinear chaotic applications. The pulsed chaos is chaotic in a pulse time interval in addition to the amplitude resulting in better concealment of data pulses in a time domain. The chaos spectrum is a flat broadband and rich in spikes making spectral detection of a message more difficult. The range of five key parameters for which erbium-doped fiber ring laser retains its chaotic behaviour is also increased significantly reducing the effectiveness of a brute force attack to guess the erbium-doped fiber ring laser parameters. The chaos message masking scheme provides a higher security in comparison with additive chaos modulation scheme for implementation of chaotic optical communication using erbium-doped fiber ring laser. The security of a complete end-to-end chaotic optical communication system is tested by launching a spectral attack to estimate the message signal. The message signal clearly hides in a stronger chaotic signal and its spectral contents are not discernible.
引用
收藏
页码:395 / 410
页数:16
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