在铜蒸气激光器的激活介质中观察到四波混频现象。
Four-wave mixing was observed in the active medium of a copper vapor laser.
分析了用小波包能量分析方法提取故障信号特征向量的方法，并改进算法解决了小波包分解中的混频现象，根据最佳分解树进行了特征选择。
Based on the frequency domain feature, energy eigenvector of frequency domain is presented using wavelet packet analysis method, and the way of best tree is used to choose symptom.
本文研究光纤非线性现象之一的四波混频对长距离相干多路光纤传输系统的影响。
In this paper, effects of one of the fibre nonlinearities, four-wave mixing, in long distance coherent multichannel optical fibre transmission are studied.
应用推荐