The measured parameters of the waveguide agreed with data measured by using guided mode method in measuring error ranges.
测得的波导参数在测量误差范围内与用导模法测得的数据一致。
The concept of quasi-guided mode is applied in equivalent current method to calculate the loss of a single mode fiber caused by mode conversion.
本文将准导模的概念用于等效电流法来求取单模光纤的模耦合损耗。
The current domestic and abroad research status is discussed firstly, and the guided wave mode and exciting method used in pipeline crack detection is determined by disperse curve and wave structure.
首先，介绍了管道导波检测技术国内外的研究现状，然后利用频散曲线和波结构确定了管道裂纹检测所用的导波模态及激励方式。
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