improved scaling rules for guided modes in nonlinear film waveguides 改进的非线性薄膜波导导模的无量纲表示
cladding-guided mode 包层传导模
by use of gabor wavelet transform and mae technologies, the arrived time to sensors of transient ae signals of specific guided mode can be precisely obtained . as the result, the precision of leak location was improved 利用gabor小波变换方法对断铅声发射信号进行时频分析,通过确定某一频率下某一模态导波到达传感器的时间,较好地实现了声发射源定位。
based on this model, a method was developed to obtain certain guided mode signal form ae signals . the final results showed that the method could reduce the multimode and disperse influence to ae signals effectively and locate the leak source correctly 在此基础上,利用结构频散特性确定相关参数、提取单一导波模态的方法,减小了多模态和频散特性对定位的不利影响,从而较好地实现了泄漏源的定位。
we begin with the maxwell-field equations, deduce the wave-propagation equations, and then analyze the characteristics of guided modes in optical fiber . based on these, we derive the coupled-mode equations that describe the interaction between the modes 从光纤中的麦克斯韦方程组出发,首先推导出描述光在光纤传播的波动方程,进而分析光纤中模式特性,并在此基础上,严格推导出描述模式耦合的耦合模方程。