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arXiv physics/0309116physics.optics
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对双极化非线性光学晶体准相位匹配参量放大理论进行了研究

To the theory of quasi-phase-matched parametric amplification in periodically-poled optical nonlinear crystals

E. V. Makeev, A. S. Chirkin

摘要:

本文提出了在相互作用波的非线性耦合系数符号为规则空间调制的晶体中,高频抽运光参量放大的理论。通过应用矩阵方法,该理论是基于一个逐步的方法。结果表明,在泵浦强度小于某一临界值的情况下,具有恒定非线性系数的单独层内的信号强度的空间动态具有振荡行为,并且从层到层的信号强度的变化通常由幂函数定义。同样的规律也适用于信号正交分量方差的变化。在大量的层,这些依赖性可以减少到众所周知的均匀的非线性光学晶体。

英文摘要:

Theory of the optical parametric amplification at high-frequency pumping in crystals with a regular space modulation of the sign of nonlinear coupling coefficient of interacting waves is developed. By applying the matrix method, the theory is based on a step-by-step approach. It is shown that, in the case where the pumping intensity is less than some critical value, the spatial dynamics of the signal intensity inside a separate layer with the constant nonlinear coefficient has an oscillatory behavior and the change of the signal intensity from layer to layer is defined, in general, by the power function. The same law is valid for the change of variance of signal's quadrature components. At large number of layers, these dependences can be reduced to the well-known ones for homogeneous nonlinear optical crystals.

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