| 1. | This phenomenon is called velocity dispersion .
这种现象称为速度频散。 |
| 2. | Velocity dispersion method
速度弥散度方法 |
| 3. | For ultrashort few - cycle pulses , the group velocity dispersion should be considered , whose influence depends on the parameters of the beam and the material
对于几个光周期的超短脉冲，除透镜色差外，还应当考虑群速度色散，且其影响依赖于透镜材料和光束参数。 |
| 4. | In general , the lens chromatic aberration and the group velocity dispersion lead to a broadening in the temporal and spatial intensity distributions at the focal plane and a decrease o
一般说来，透镜色差和群速度色散会使焦平面上脉冲光束的时间、空间光强分布展宽，峰值光强降低。 |
| 5. | First , we investigate the feasibility of determining the pairwise velocity dispersion ( pvd ) for lyman break galaxies , and of using this quantity as a discriminator among theoretical models
本文探讨了对lymanbreak星系的对速度弥散( pvd )进行测量以及用该量来约束理论模型的可行性。 |
| 6. | The origins of dispersion error are analyzed ; effects of initial velocity dispersion , ballistic coefficient dispersion , drift coefficient dispersion , range wind & cross wind dispersion on the ballistic dispersion are discussed
分析了散布误差的起源，讨论了初速散布、射角散布、弹道系数散布、偏流散布、纵横风散布对密集度的影响。 |
| 7. | The origin of supercontinuum ( sc ) generation in optical fibers has been conjectured to be the interplay between fiber nonlinearities ( self phase modulation , cross phase modulation and raman self scattering ) and group - velocity dispersion ( gvd )
光纤中超连续supercontinuum ( sc )谱的产生源于光纤中各种非线性效应(自相位调制效应、交叉相位调制效应，四波混频效应及受激raman散射等)和群速度色散的共同作用。 |
| 8. | We derive an analytic expression of the group velocity dispersion ( gvd ) induced chirp and the self - phase modulation ( spm ) induced chirp in the normal dispersionregion of non - kerr - like optical fibers with saturable nonlinarity . the evolution of chirp is simulated by numerical methods . the studied results show that the more powerful saturable effects , the smaller is chirp and the gently is chirp . the net chirp is zero in the central region of the pulse
从理论上推导出具有饱和非线性的非克尔光纤正常色散区内，群速度色散效应导致的啁啾和自相位调制效应导致的啁啾解析表达式.利用数值解法模拟了非克尔光纤正常色散区啁啾演变过程.研究结果表明：当非克尔光纤的饱和非线性增强时，净啁啾不断减小，而且，越来越平缓，脉冲中心附近区域净啁啾接近零 |
| 9. | There has been a revolutionary advance in ultrashort pulse technology since the discovery of self - mode locking of ti : sapphire lasers . few - femtosecond pulses have already been generated from ti : sapphire lasers , by means of combining self - phase modulation with negative group velocity dispersion , which is similar to the way of soliton generation
钛宝石激光自锁模的发现使得超短脉冲技术发生了革命性的变化，利用自相位调制和负群速度色散结合的类孤子产生方式，人们已经在钛宝石锁模激光器上得到了脉宽只有几个飞秒的光脉冲。 |
| 10. | In the picosecond and femtosecond time field , the durations of the pump and signal pulses are so short that special propagating characteristics of ultrashort pulse laser should be taken into account , especially the pulse broadening induced by the group velocity mismatch and the group velocity dispersion
在皮秒和飞秒时域，由于泵浦光与产生的信号光的持续时间特别短，故在讨论超短脉冲与物质相互作用时必须计及超短脉冲在介质中传输的特殊性质，尤其是群速失配与群速色散引起的脉冲展宽。 |
