| 激光束在LiNbO3:Fe晶体中的异常衍射现象(Ⅰ)——e光入e光出的衍射 |
| |
| 引用本文： | 蒋毅坚,廖理几,陈为群,张鹏翔,刘玉龙.激光束在LiNbO3:Fe晶体中的异常衍射现象(Ⅰ)——e光入e光出的衍射[J].物理学报,1990,39(9):1501-1510. |
| |
| 作者姓名： | 蒋毅坚 廖理几 陈为群 张鹏翔 刘玉龙 |
| |
| 作者单位： | (1)北京工业大学应用物理系,北京100022; (2)中国科学院物理研究所,北京100080 |
| |
| 摘 要： | 根据的相位光栅各向异性衍射理论,应用顾世杰、李荫远发展的方法,对于激光束在厚的LiNbO3:Fe晶体(厚度≈1cm)中的异常衍射现象作了计算。如果晶体中被照射后有无规的电荷富集分布,则Fourier分解后可得到无穷个相位光栅,衍射图形决定于光栅的衍射效率。计算结果表明,对e光入e光出的衍射图形,可以解释中央光斑(由透镜效应所决定)两边的光瓣。结果与实验基本符合。
关键词：
|
| 关 键 词： | 激光束 LiNbO3：Fe 晶体 衍射 |
| 收稿时间： | 1989-09-28 |
THE ANOMALOUS DIFFRACTION OF A LASER BEAM IN LiNbO3:Fe CRYSTAL (Ⅰ)——e→ e DIFFRACTION |
| |
| JIANG YI-JIAN,LIAO LI-JI,CHEN WEI-QUN,ZHANG PENG-XIANG and LIU YU-LONG.THE ANOMALOUS DIFFRACTION OF A LASER BEAM IN LiNbO3:Fe CRYSTAL (Ⅰ)——e→ e DIFFRACTION[J].Acta Physica Sinica,1990,39(9):1501-1510. |
| |
| Authors: | JIANG YI-JIAN LIAO LI-JI CHEN WEI-QUN ZHANG PENG-XIANG and LIU YU-LONG |
| |
| Abstract: | Based on the anisotropic diffraction theory of phase gratings of Stepanov et al., using the method developed by Gu and Li, we have made a detail calculation of the effect of anomalous diffraction of a laser beam passing through a cube of LiNbO3: Fe crystal. Fourier transform of the chaotic destribution of electric charge excessively accumalated in small regions shows the existence of infinite number of phase gratings. The diffraction pattern is determined by the diffraction efficiency of these gratings. The results of calculation show that the two lobes on both sides of the central spot the shapes of which are determined by the lease effect can be interpreted. Theory and experimental data fit fairly well. |
| |
| Keywords: | |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
| 点击此处可从《物理学报》下载免费的PDF全文 |
|
