激光耦合同步及其在光纤混沌保密通信中的应用

本文建立了光纤混沌保密通信耦合同步系统模型 ,实现了外部光注入分布反馈半导体激光器激光混沌在长距离光纤传输中的耦合同步 ,证明了光纤的交叉相位调制是限制激光混沌在光纤传输中同步的主要原因 ,导出了这种传输的极限 .该同步系统在长距离光纤混沌模拟和数字保密通信中的数值模拟表明 ,该系统确有较高的保密性能和反破译能力 .

激光混沌耦合同步及其在保密通信中的应用

建立了外部光注入半导体激光器激光混沌耦合同步系统,导出了耦合条件下的激光扰动方程和激光同步扰动方程。成功模拟了外部光注入波长1.31mm分布反馈半导体激光器的激光混沌耦合同步,其同步误差小且抗噪声干扰能力强。该同步系统在混沌模拟和数字保密通信中的数值模拟表明,无论是在时域还是在频域,信息都难以被分离,该系统确有较高的保密性能和反破译能力。

Theory of Dynamics In-Phase Locking and Quasi-Period Synchronization in Two Mutually Coupled Multi-Quantum-Well Lasers

Abstract We study dynamics in two mutually coupling multi-quantum-well lasers. We carry out theoretical and numerical analysis of synchronization, anti-synchronization, in-phase locking in the two identical lasers but detuning, in detain. It is proved that the coupling level determines stability of the lasers by analyzing the eigenvalue equation. Critical case of locking is discussed via the phase difference equation. Quasi-period and stable states in the two lasers are investigated via varying the current, detuning and coupling level.

Preference of Chaotic Synchronization in a Coupled Laser System

In a coupled laser system, the dynamics of the receiving laser is investigated when two separate transmitting lasers are injected into the receiving laser with different coupling strengths. It is shown that the phenomenon of preference of chaotic synchronization appears under appropriate coupling conditions. The receiving laser will entrain the pulses of either one or both transmitting lasers when the coupling is strong while it keeps its own dynamics when the coupling is weak.