摘要:
本文系统研究了基于泰伯效应(Talbot)的位相可调掺镁铌酸锂二维六角位相阵列光栅及其光衍射成像,对光栅占空比D、不同位相差?φ、及泰伯分数β条件下的光栅近场光衍射强度分布进行了理论研究,结果表明当光栅占空比D=52%、位相差?φ=0.75π、泰伯分数β=0.2时,光栅近场衍射光图像效果最佳.实验设计与制备了掺镁铌酸锂二维六角位相阵列光栅,并对其进行了Talbot衍射光成像实验研究,得到了不同位相差和不同泰伯分数β条件下光栅近场衍射光图像,实验结果与理论研究结果相符.
Abstract:
In this paper, theoretical researches on the MgO:LN tunable hexagonal phase array grating based on the Talbot effect were presented. Researches revealed the effects on the intensity distribution of near-field diffraction from array grating duty cycle which is defined as D, phase difference which is defined as?φ and the distance coefficient which is defined asβ. The results obtained show that good near-field diffraction images can be achieved at D=52%,?φ=0.75π,β =0.2. Based on the theoretical researches, the tunable hexagonal phase array grating is designed and fabricated from periodically poled MgO:LN crystal. Through experimental test, the Talbot effect diffraction imaging map is successfully obtained at different?φ andβ, which verifies the results of the theoretical researches.
首页
登录
注册
下载: