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.
分析了单透镜色差和群速度色散对超短脉冲高斯光束聚焦的时间分布及脉冲波面的影响 ；
The influence of lens dispersion up to second order on the spatial and temporal intensity distribution of the femtosecond Gaussian beam was analyzed.
基于标量近似理论，使用有效折射率方法对光子晶体光纤的群速度色散特性进行了详尽研究。
Based on a scalar approximation, the group-velocity-dispersion properties of photonic crystal fiber (PCF) were investigated in detail by equivalent-index model.
研究结果表明，群速度色散（GVD）对大啁啾脉冲的影响很小，谱宽对自聚集的影响可以忽略。
The results showed that the effect of group velocity dispersion(GVD) on the pulse with large chip was slight and the effect of spectral width on the self-focusing properties could be ignored.
本文概述了光子晶体光纤的三个突出的优点：单模传输特性、高非线性效应和可控群速度色散特性。
We introduce three unique properties of PCF which are endlessly single mode, controllable dispersion and high nonlinearity.
用光束脉冲矩阵法分析了多色光学谐振腔的稳定条件；给出了计算腔内净群速度色散的准确表达式。
The stable condition of multi wavelength optical cavities is discussed by the method of ray pulse matrices, and the formula of net GVD is deduced.
分析结果表明，带楔角的取样反射镜与后续光路中使用楔形真空窗口构成了一对棱镜，产生负的群速度色散。
The result shows that the edged sampling mirror and the edged vacuum window can be treated as a pair of prisms, which generates negative group velocity dispersion.
详细讨论了群速度失配、群速度色散和三阶非线性相位调制效应对倍频光脉冲波形、光谱及转换效率的影响。
The effects of group-velocity mismatch and dispersion, third-order nonlinear phase modulation on pulse shape, spectrum distribution and conversion efficiency of second-harmonic pulse were discussed.
在群速度色散和自相位调制的共同作用下，可用分步傅里叶方法模拟初始啁啾对高斯脉冲在光纤中传输的影响。
Then the effects of higher-order group-velocity dispersion (GVD) on SC generation in different fibers are analyzed and contrasted in details through simulation.
由于载流子引起的群速度色散效应，使远离饱和区工作的TW-SLA会对有频率啁啾的光脉冲产生展宽或压缩。
The chirped pulses will be compressed or broadened because of carrier-induced group-velocity dispersion when TW-SLA operates far below saturation.
本发明属于光学技术领域，是一种用于飞秒激光脉冲，精确读取时间延迟量和消除群速度色散功能的气体延迟系统。
The present invention relates to the field of optical technology and the gas delay system is for femto second laser pulse.
介绍了SC谱的产生机理，并通过数值计算具体分析和比较了各种光纤中高阶群速度色散（GVD）对SC谱产生的影响。
Then the effects of higher-order group-velocity dispersion (GVD) on SC generation in different fibers are analyzed and contrasted in details through simulation.
论述了光纤群速度色散、偏振模色散及光纤中各种非线性效应对光波分复用系统性能的影响，并给出了为减小其影响而应采取的措施。
The effects of group velocity dispersion, polarization mode dispersion and nonlinearity in fiber on the performance of wavelength division multiplexing system are analyzed in detail.
考虑了光源初始啁啾的作用 ，推导出均方根脉宽的解析表达式 ，分析表明 ：二阶偏振模色散对脉冲展宽的作用与群速度色散及啁啾有关 ，一阶偏振模色散的作用则与这两者无关。
Taken into account both second order dispersion and SPM in the abnormal-dispersion region of single-mode fibers, we obtained the expression of chirp induced by GVD and SPM.
然后从色散介质中相速度与群速度的关系，讨论了相速度和群速度超光速的可能性。
Then the possibility of larger phase velocity and group velocity than light speed in dispersive medium is discussed.
然后从色散介质中相速度与群速度的关系，讨论了相速度和群速度超光速的可能性。
Then the possibility of larger phase velocity and group velocity than light speed in dispersive medium is discussed.
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