准推进系数
If we introduce the aperiodic or periodic reversal of the nonlinear optical coefficient into the waveguides, the CSHG conversion efficiency can be improved greatly, the configuration also has been called quasi-phase matched CSHG ( QPM-CSHG).
如果引入二阶非线性系数的周期极化反转,即考虑到准相位匹配的情况,切伦科夫倍频效率将会得到极大的提高,可以将之称为准相位切伦科夫倍频(QPM-CSHG)。
The non-dimensional pump head coefficient tends to become larger than the quasi-steady value at the very beginning of the start, which indicates obvious transient effect.
在启动初始阶段,无量纲扬程呈现很大值,继而迅速减小到低于准稳态假设值,表现出明显的瞬态效应。
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