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Chaos synchronization and communication in closed-loop semiconductor lasers subject to common chaotic phase-modulated
Optics Express
|January 16, 2019
Summary
This study introduces a novel closed-loop chaos system using semiconductor lasers with common chaotic phase-modulated optical feedback (CCPMOF). The system achieves wideband chaotic carriers, robust chaos synchronization, and high-speed secure communication.
Area of Science:
- Optoelectronics
- Nonlinear Dynamics
- Secure Communications
Background:
- Chaos systems offer potential for secure communication due to their complex dynamics.
- Existing closed-loop chaos systems face limitations in bandwidth and synchronization robustness.
Purpose of the Study:
- To propose and demonstrate a novel closed-loop chaos system.
- To investigate the characteristics of chaotic carriers and chaos synchronization.
- To evaluate the performance and security of chaos communication.
Main Methods:
- Utilizing external-cavity semiconductor lasers.
- Implementing common chaotic phase-modulated optical feedback (CCPMOF).
- Systematic numerical investigation of system parameters and performance metrics.
Main Results:
- Achieved wideband chaotic carriers with suppressed time-delay signatures (TDS).
- Demonstrated high-quality chaos synchronization with robustness to mismatch, frequency detuning, and phase fluctuations.
- Confirmed availability of high-speed chaos communication.
Conclusions:
- The proposed CCPMOF system significantly enhances chaotic carrier bandwidth and complexity.
- The system offers improved chaos synchronization and communication performance over conventional methods.
- The developed system is suitable for high-speed, secure optical communication.
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