晶体锥折射空心光束的位相差及偏振特性  

Phase Difference and Polarization Characteristic of Hollow Beams Achieved by Conical Refraction Effect

作　　者：武志超[1] 董渊[1] 梁柱[1] 

机构地区：[1]长春理工大学理学院激光技术研究所,长春130022

出　　处：《光子学报》2010年第8期1487-1490,共4页Acta Photonica Sinica

摘　　要：根据双轴晶体内锥折射效应产生空心光环的基本原理,推导出空心光环上各点相对于光环最低点的位相差分布规律解析式.通过模拟得到了位相差分布规律,证明了光环上各点的偏振方向变化具有连续性.实验采用非偏振的He-Ne激光准直后经小孔光阑垂直照射KNbO3晶体获得了空心光束,对其偏振特性进行了测试,结果与理论分析相吻合,很好的验证了理论分析的正确性.Based on the principle of hollow ring achieved by conical refraction effect in biaxial crystal,the formula of phase difference distribution between every point and the minimal point in the hollow ring are deduced,and the regularity of phase difference distribution is obtained by means of simulations.The continuity in the circumference of polarization direction variation of each point in the hollow ring is proved.In the experiment,un-polarized He-Ne laser is adopted to perpendicular radiate KNbO3 crystal,then polarization characteristic of hollow beams achieved by conical refraction effect in biaxial crystal is tested.The result of theoretical analysis agrees well with experiment.

关 键 词：双轴晶体 位相差分布 锥折射 空心光环 偏振特性 

分 类 号：O734[理学—晶体学]