| 1. | The effects of relativistic self - focusing ( rsf ) and preformed plasma channel guiding are analyzed
对相对论性自聚焦效应和预等离子体通道导引进行了分析。 |
| 2. | It is well known that nonlinear self - focusing effect is one of the important factors to limit icf laser energy and worsen beam quality
实践表明，非线性自聚焦效应是限制icf驱动器激光输出能量及破坏光束质量的主要因素之一。 |
| 3. | In this high power laser system , nonlinear self - focusing effect especially the small - scale self - focusing is the main limiting factor
在这种高功率激光系统中，非线性自聚焦效应是其主要的限制因素，其中尤其以小尺度自聚焦效应最为严重。 |
| 4. | So , the two main effects ( small - scale self - focusing and " hot image " ) relate to the 3rd order nonlinear effect have been studied in this work
因此，在本论文中，我们系统地对与介质三阶非线性有关的两种现象(小尺度自聚焦效应和“热像”现象)进行了研究。 |
| 5. | By a method for comparing , the conversion efficiency formula of the gaussian wave for second - harmonic generation ( cefgshg ) in general circumstances , which toke accounts of walk - off effect and self - focus effect together , was attained
通过类比的方法给出了一般情况下，同时考虑走离效应和自聚焦效应时的高斯光束倍频转换效率公式。 |
| 6. | The conditions for the long distance propagation are discussed in detail . the results are useful in determining the appropriate size of the channel to be preformed and can guide the future research in ultrashort intense laser propagation
首次利用自恰电子空腔效应分析了超短超强激光在低密度等离子体中的长距离传输和自聚焦效应，详细分析了长距离传输的条件。 |
| 7. | We have calculated the effects which gain and loss impose on the formation distances of filaments of small - scale modulations , the results indicate that properly increasing the gain coefficient can counteract the small - scale self - focusing in certain degree
我们初步估算了增益和损耗对于小尺度调制的成丝距离的影响，认为适当地提高增益系数，能够从一定程度上抑制小尺度自聚焦效应。 |
| 8. | Chapter 2 : characteristics of propagation of ultra - intense laser beam in a partially stripped preformed plasma channel is discussed , in which the relativistic self - focusing effects , together with the perturbed plasma density , is discussed
第二章：本章阐述了超强激光光束在抛物型部分电离的预等离子体(聚焦和散焦)隧道中的传输特性。研究了相对论自聚焦效应和等离子体波引起的密度扰动对传输的影响。 |
