啁啾

The common equation of the evolution of spectrum caused by selfphase modulationis presented, which is the convolution of action spectrum and chirped spectrum caused by selfphase modulation when carrier frequency is single.

给出了由自相位调制引起的频谱演变的普遍表示，即单载频脉冲的SPM引起的啁啾频谱与光源的频谱的卷积，通过数值计算给出从相干脉冲到非相干脉冲的频谱演变规律。

With the invention of the chirped pulse amplification technology more than 10 years ago, a new generation of lasers appear.

随着发明的啁啾脉冲放大技术技术10多年前，新一代激光的出现。

Spectrum control technology and its application researchBasic theory of smoothing by spectral dispersion in high-power laser system was studied. Periodical frequency modulation was obtained by chirped pulse stacking, and novel special gratings were proposed here to obtain angular spectral dispersion and temporal smoothing of focal spot.

并在国际上首次成功地应用于激光聚变高功率激光系统中。3、激光脉冲光谱控制技术及应用研究研究了高功率激光光谱色散平滑的基本理论，提出利用堆积啁啾脉冲的周期性光谱调制特性和新颖特殊光栅实现光谱角色散和激光束远场焦斑的时间平滑。

We firstly bring forward and realize technologies of arbitrarily shaping laser pulse in the time domain by chirped pulse stacking, programmablely shaping spatial intensity by crystal liquid diaphragm, focused spot smoothing using angular spectrum dispersion by special gratings and detecting and compensating the small patch wave front aberration. Precise, programmable, efficient and \'all parameters\' condition of high power laser system has been obtained.

首次提出并实现了啁啾脉冲堆积型的时间波形任意整形；液晶光阀可编程光强空间整形；特殊光栅光谱角色散焦斑束平滑和小尺度波前畸变的探测和补偿，从而对高功率激光系统的激光束实现了高精度、可编程、有效的"全息"控制。

As the sparrow had its trill, sitting on the hickory before my door, so had I my chuckle or suppressed warble which he might hear out of my nest.

正像那麻雀，蹲在我门前的山核桃树上，啁啾地叫着，我也窃窃笑着，或抑制了我的啁啾之声，怕它也许从我的巢中听到了。

This paper introduced the basic theory and the design method of chirped mirrors.

介绍了啁啾镜的基本原理和优化设计思想，阐述了优化设计的基本过程，并通过计算机优化计算了啁啾镜设计。

Supposing the spectral distribution of the chirped pulse after amplification is be Gauss or super-Gauss distribution,the inverse calculation on 100 J Nd∶glass chirped pulse amplication system is carried out.

理论上假定放大后啁啾脉冲的光谱分布为高斯分布或超高斯分布，对&百焦耳级钕玻璃啁啾脉冲放大系统&进行逆运算。

Further, the influence of apodizing function, chirp coefficient and cross-coupling coefficient on the dispersion of thin-clad chirped LPFG is also analyzed.

进一步分析了切趾函数、啁啾系数、交叉耦合系数等参数对薄包层啁啾LPFG色散的影响。

To improve dispersion compensation capabilities of chirped long-period fiber grating for fiber communication, the method using thin-clad chirped LPFG is proposed.

为了提高啁啾长周期光纤光栅光纤通信的色散补偿能力，提出了利用薄包层啁啾LPFG进行色散补偿的方法。

On the basis of the analysis,the self-focusing properties of the chirped Gaussian pulse in the chirped pulse amplification system were analyzed and discussed,and the numerical calculations were performed.

在此基础上，针对啁啾脉冲放大系统中的啁啾高斯脉冲，对其全光束自聚焦特性进行了计算模拟和分析讨论。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。