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激光混沌同步及其在光纤保密通信中的应用 被引量:14

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摘要 通过耦合激光混沌同步系统和光纤传输信道,提出光纤混沌保密通信设想;建立了半导体激光器激光混沌反馈同步系统,导出了同步误差和解码公式;模拟实现了波长1.31μm分布反馈半导体激光器的两个激光混沌系统的同步,其同步误差几乎为零;分析了系统参数失配、同步暂态响应、噪声影响;提出了增加反馈系数提高同步和抗干扰的方法.分析了光纤中的群速度色散效应和自相位调制对激光混沌信号及其同步的影响,发现群速度色散不仅会影响脉冲的形态,而且会影响激光混沌同步及其解码,限制光纤混沌通信的传输距离;而自相位调制却并不影响脉冲的形态,但产生的非线性相移却会影响激光混沌同步及其解码,限制光纤混沌通信系统的传输距离,并由此导出了光纤混沌通信中的最大光功率公式;数值模拟了远程光纤混沌保密通信的振幅调制和参数调制的应用方法.
出处 《中国科学(E辑)》 CSCD 北大核心 2004年第4期467-480,共14页 Science in China(Series E)
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参考文献20

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二级参考文献7

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