自散焦介质对非线性热像的抑制效应  

Suppression Effect of Self-defocusing Media on Hot Images from Obscurations in an Intense Laser Beam

作　　者：王友文[1,2] 文双春[1] 胡勇华[1] 章礼富[1] 杨华[1] 傅喜泉[1] 

机构地区：[1]湖南大学计算机与通信学院,湖南长沙410082 [2]衡阳师范学院物理与电子信息科学系,湖南衡阳421008

出　　处：《湖南大学学报（自然科学版）》2009年第9期87-92,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金委员会与中国工程物理研究院联合基金资助项目(10576012);国家自然科学基金资助项目(60538010;10674045);国家863计划资助项目(2008AA8041705);衡阳师范学院科学基金资助项目(08B03)

摘　　要：理论分析了运用自散焦介质抑制热像的可行性,进而通过数值模拟方法,研究了自散焦介质对强激光通过自聚焦介质非线性热像的抑制效应.结果表明,自散焦介质放置在自聚焦介质的前面或后面均能有效地抑制热像形成,但较厚自散焦介质后置情况的热像抑制效果好于前置情况,且自散焦介质与自聚焦介质越薄,二者之间的间隙越小,抑制效果越好.The suppression effect of self-defocusing media on hot images was investigated analytically and numerically. It has been shown that hot images may be successfully suppressed through self-defocusing media located in the front of the self-focusing medium and at the back of the self-focusing medium, although the latter can achieve better suppression effect than the former for a thicker self-defocusing medium. Furthermore, the thinner the self-focusing medium and the self-defocusing one, and the shorter the space between them, the better suppression effect of self-defocusing media on hot images.

关 键 词：高功率激光 热像 小尺度自聚焦 自散焦介质 

分 类 号：O437.5[机械工程—光学工程]