群速度色散： 通常所说的，相速度色散是色散的一阶效应，而群速度色散是色散的二阶效应。群速度色散的定义为群速度对角频率的导数。
...群速度色散,[gap=1248]Key words mid-infrared, supercontinuum, tellurite microstructured fibers, group-velocity dispersion, ...
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并对此种光栅的反射谱，时延及群速度色散进行了理论分析；
The reflection spectrum, time delay, and group velocity dispersion (GVD) of the gratings are analyzed.
在上所述的情况中，太赫兹脉冲的有效传输受限于高损耗，或导波的群速度色散。
In all the above cases, the utility for transport of terahertz pulses is limited by the high loss, or by the group velocity dispersion of the guided waves.
应用等效折射率模型对折射率导模光子晶体光纤的群速度色散特性进行了详细的讨论。
The group velocity dispersion properties of photonic crystal fiber (PCF) were investigated in detail by equivalent index model.
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