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arXiv 1207.2678nlin.PS
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孤子型refractive index模式介质中相干波的非线性放大

Nonlinear amplification of coherent waves in media with soliton-type refractive index pattern

Conte Robert, Bugaychuk Svetlana

摘要:

本文导出了非线性腔中光波动态自衍射的复Ginzburg-Landau方程。考虑了波相互作用的反射几何以及具有立方非线性(包括局部和非局部非线性响应)和弛豫的介质的情况。在稳态时,腔中形成了一个稳定的局域空间结构,即“暗”耗散孤子。强度图案以及动态光栅振幅的包络采用$\tanh$函数的形状。得到的复Ginzburg-Landau方程描述了这种包络的动力学,同时这种空间结构的演化改变了输出波的参数。新的影响预测在这个系统中由于转换的耗散孤子发生在脉冲与连续波的相互作用,如:保留的脉冲形状在长的非线性腔中的脉冲传输过程中;种子脉冲的巨大放大,这需要能量由于重新分配的泵连续能量到信号。

英文摘要:

We derive the complex Ginzburg-Landau equation for the dynamical self-diffraction of optical waves in a nonlinear cavity. The case of the reflection geometry of wave interaction as well as a medium that possesses the cubic nonlinearity (including a local and a nonlocal nonlinear responses) and the relaxation is considered. A stable localized spatial structure in the form of a "dark" dissipative soliton is formed in the cavity in the steady state. The envelope of the intensity pattern, as well as of the dynamical grating amplitude, takes the shape of a $\tanh$ function. The obtained complex Ginzburg-Landau equation describes the dynamics of this envelope, at the same time the evolution of this spatial structure changes the parameters of the output waves. New effects are predicted in this system due to the transformation of the dissipative soliton which takes place during the interaction of a pulse with a continuous wave, such as: retention of the pulse shape during the transmission of impulses in a long nonlinear cavity; giant amplification of a seed pulse, which takes energy due to redistribution of the pump continuous energy into the signal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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