| 1. | In this thesis , induced focusing in self - defocusing media is explored thoroughly by numerical method
本文用数值方法对自散焦介质中的光束诱导聚焦现象进行了系统的研究。 |
| 2. | It ' s well known that both thermal self - defocusing effect and reverse saturable absorption can lead to optical limiting
众所周知，热自散焦效应和反饱和吸收效应都能导致光限幅。 |
| 3. | The historical review is given about the research on the induced focusing of optical beams in self - defocusing nonlinear media
在此基础上对三维自散焦介质中由交叉相位调制效应诱导的光束聚焦进行系统研究。 |
| 4. | In this , we focus on the phenomena of the induced focusing when two beams propagation in self - defocusing nonlinear media in an off - axis geometry
本论文旨在研究三维自散焦介质中由交叉相位调制效应诱导的光束聚焦。 |
| 5. | How a dark pump beam induces a bright probe beam to focus in two - and three - dimensional self - defocusing media is discussed in chapter 5
第五章，讨论了二维和三维自散焦介质中具有暗光束分布的泵浦光对基模高斯信号光的聚焦作用。 |
| 6. | We study the evolution of a probe beam profile in the influence of a pump beam in the off - axis geometry and obtain the typical process of probe focusing
详细研究了泵浦光束输入振幅对信号光束波形的影响，得到了三维自散焦介质中初始高斯信号光束聚焦时波形的典型演化过程。 |
| 7. | It has been theoretically and experimentally demonstrated that in self - defocusing media , a weak beam ( the probe ) can be induced to focus by a strong beam ( the pump ) that propagates simultaneously with it
理论与实验结果均表明，在自散焦介质中，强泵浦光可诱导与其共同传输的弱信号光聚焦。 |
| 8. | In chapter 4 , it is simulated that a probe beam and a pump beam counter - propagate in a two - dimensional self - defocusing medium and thorough analyses are made to the induced focusing in this configuration
第四章，用分步傅立叶方法模拟双光束在二维自散焦介质中的对向共同传输过程，对出现的诱导聚焦现象进行了系统的分析。 |
| 9. | In this paper , dual - beam transmission problem that possess to a certainty included angle and gains the nonlinear schrdinger coupled equation ( nnlse ) in self - defocusing media is discussed
摘要自散焦介质中双光束斜入射耦合能发生光束偏转，通过数值模拟发现在非线性折射率不是均匀分布时光束偏转能降低抽运光功率并且偏转角度不减小，在相同的功率条件下，能产生更大的偏转。 |
| 10. | In chapter 2 , the basic theory on the simultaneous propagation of two optical beam in nonlinear media is given briefly , and a couple of parameters for describing the focusing of a beam are introduced as well
全文共六章，各章内容如下：第一章，介绍了自散焦介质中的光束诱导聚焦现象及其研究进展。第二章，简述了双光束传输的基本理论，并且引进了描述光束聚焦过程的几个参量。 |
