Bao C, Zhang J, Wang S
Appl Opt. 1988 Nov 1;27(21):4572-7. doi: 10.1364/AO.27.004572.
This paper demonstrates dual-frequency phase conjugation waves via the high-order nonlinear effect by nondegenerate six-wave mixing in iron-doped lithium niobate. In the experiment, two conjugation waves of different frequency are generated. Conjugation wave 1 is similar to nondegenerate four-wave mixing; conjugation wave 2 is completely different. The experiments measure the relationships between two conjugation wave intensities and parameters, respectively, and compare the differences of the two conjugation waves. To explain the experimental results, we assume that there is a fifth-order nonlinear interaction in crystal, and we believe the two conjugation waves are generated via different level nonlinear interactions. The theory agrees with the experimental results.
本文通过掺铁铌酸锂中的非简并六波混频高阶非线性效应演示了双频相位共轭波。在实验中，产生了两个不同频率的共轭波。共轭波1类似于非简并四波混频；共轭波2则完全不同。实验分别测量了两个共轭波强度与参数之间的关系，并比较了两个共轭波的差异。为了解释实验结果，我们假设晶体中存在五阶非线性相互作用，并且认为两个共轭波是通过不同级别的非线性相互作用产生的。理论与实验结果相符。
