小级数Ince-Gaussian光束光强模式分析  

Intensity Modes Analysis of Ince-Gaussian Light Beam with Lower Degree

作　　者：甄志强[1] 马海祥[1] 李新忠[1] 李贺贺[1] 王静鸽[1] 

机构地区：[1]河南科技大学物理工程学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2017年第6期86-90,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(61205086;11504091);瞬态光学与光子技术国家重点实验室开放基金项目(SKLST201203);河南省高等学校青年骨干教师资助计划基金项目(2013071)

摘　　要：研究了因斯-高斯(IG)光束级数m较小时,分立光瓣模式的光强分布。通过数值模拟,对IG奇偶模式以及奇偶模式线性叠加生成的PIG分立光瓣模式的光强进行了分析。分析结果表明:m较小时,PIG分立光瓣模式光瓣的空间位置介于奇偶模式之间,但是光瓣的光强分布变化较为明显。同一模式光瓣角向椭圆变量越接近于椭圆长轴,其光强比重越大。在统一总光强后,相同阶数与级数的不同模式光瓣总光强与角向椭圆变量差为一个三次函数的关系。对于偶模椭圆长轴上的光瓣,随着该模式通过PIG^(π/2)模式转化为奇模,该光瓣上的光强分布逐渐由弥散向着逆时针方向集中。The intensity distribution of discrete light petal mode was studied when series of m of Ince-Gaussian( IG) light beam was lower. By numerical simulation,odd and even modes of IG beam,and its linear superposition Ince-Gaussian beam with initial( PIG) mode was analyzed. The results show that the spatial position of light petal of the PIG mode is located at the center of the odd and even mode when the series of m is lower. However,the light intensity distribution of the PIG mode changes dramatically. For the same mode of the PIG beam,the intensity percent of one petal is higher when its angular elliptic variables are closer to the major axis of the ellipse. With uniform total light intensity,the relation between the petal total intensity and the difference of the angular elliptic variables is conformed to a cubic function for the same order and different series modes. The intensity distribution of the petal in the major axis of the even mode is changed from dispersion to focus in the anticlockwise direction when the mode is changed from PIG^(π/2) mode to odd mode.

关 键 词：物理光学 因斯-高斯光束 模式分布 光场调控 微粒操纵 数值模拟 光强分析 

分 类 号：O436[机械工程—光学工程] O438.1[理学—光学]