| 1. | Recently , considerable interest has been paid to the characteristic of focusing of the partially coherent beams
近年来,许多研究者开始对部分相干光束聚焦特性的研究产生了浓厚兴趣。 |
| 2. | 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。 |
| 3. | 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。 |
| 4. | This kind of laser can output two beams of green and violet . after focused , the laser beam is totally meted with the requirements of pld
国产的四倍频yag激光器价格低、性能稳定、能输出绿光和紫光，光束聚焦后能达到镀膜要求。 |
| 5. | The focusing properties of an annular beam are demonstrated , which give guidance for some design in icf driver structure . 4
给出了环形光束聚焦特性分析，对于icf中“同轴型”双程放大光路布局设计检验有着理论上的指导意义； 4 |
| 6. | Further , comparison between copropagation and counter - propagation of two beams shows that some characteristics of focusing in these two configurations are different
文中还将对向传输与同向传输两种框架下光束聚焦的特性进行了比较。 |
| 7. | 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。 |
| 8. | 2 . according to the huygens - fresnel principle , we have derived the propagation expressions of the partially coherent beams passing through dual - focus optical systems and investigated the phenomenon of focal switches of the partially coherent
2 .从惠更斯-菲涅耳原理出发,推导了部分相干光束通过双焦聚焦透镜系统的传输公式,研究了部分相干光束聚焦的焦开关现象。 |
| 9. | 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。 |
| 10. | The results show that radius and position of focal beam waist , focal angle and focal depth describe focal beam properties . they are determined by waist and rayleigh length of beam before focusing , the position and focal length of focus mirror
聚焦光束束腰位置和半径、聚焦角、焦深、焦点偏移量以及焦点漂移量是描述光束聚焦特性的主要参数,它们由四个参量共同决定,分别为聚焦前光束的束腰半径、瑞利长度和聚焦镜的焦距以及聚焦镜到光束束腰位置的距离。 |
