Electro-Optics Program, University of Dayton, 300 College Park, Dayton, Ohio 45469, USA.
Opt Lett. 2011 May 1;36(9):1605-7. doi: 10.1364/OL.36.001605.
In this Letter, we propose and experimentally demonstrate the generation of second-order full Poincaré beams and its applications in two-dimensional flattop beam shaping with spatially variant polarization under low NA focusing condition. High-quality flattop profiles with steep edge roll-off can be obtained with this technique. The experiment results also demonstrate that flattop profile can be maintained for different input beam sizes by conveniently rotating a half-wave plate.
在这封信件中，我们提出并实验证明了二阶全 Poincaré 光束的产生及其在低数值孔径聚焦条件下具有空间变化偏振的二维平顶光束整形中的应用。通过这种技术可以获得具有陡峭边缘滚降的高质量平顶轮廓。实验结果还表明，通过方便地旋转半波片，可以保持不同输入光束尺寸的平顶轮廓。
