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对光纤混沌传输理论及混沌信号与光纤传输媒介相互作用的物理机制进行了理论研究.通过耦合激光混沌系统和光纤传输信道,提出光纤混沌信号传输的非线性演化物理模型.着重分析光纤自相位调制对激光混沌信号传输与演化的作用.结果表明:自相位调制不影响混沌信号脉冲的形状,但能产生非线性相移使混沌信号频谱展宽;自相位调制不影响混沌信号脉冲的功率分布和场强分布,但能影响混沌信号脉冲的功率频谱分布,影响混沌信号光场以及慢变场的变化.提出混沌信号在光纤传输中的非线性演化频率啁啾和形式,数值模拟了混沌信号在光纤传输过程中的相位、频谱、场以及场的慢变部分的相空间等演化形式和特点.
The physical mechanism of optical fiber chaos transmission theory and the interaction between chaotic signal and optical fiber transmission medium is studied theoretically.The nonlinear evolution physics model of optical fiber chaos signal transmission is proposed by coupling laser chaos system and optical fiber transmission channel.The emphasis is put on the analysis of optical fiber self-phase modulation The results show that the self-phase modulation does not affect the shape of chaos signal pulse, but it can produce nonlinear phase shift to broaden the spectrum of chaotic signal. Self-phase modulation does not affect the power distribution and field of chaotic signal pulse But can affect the power spectral distribution of chaotic signal pulse and affect the change of optical field and slow-varying field of chaotic signal.The chirp and its form of nonlinear evolution frequency of chaotic signal in optical fiber transmission are proposed.The numerical simulation of chaotic signal in fiber The phase, spectrum, field and the phase space of the slowly varying part of the field in the transmission process and other evolutionary forms and characteristics.