Wang Yulong, Xie Lijuan, Ye Jiasheng, Sun Wenfeng, Wang Xinke, Feng Shengfei, Han Peng, Kan Qiang, Zhang Yan
Opt Lett. 2017 Dec 1;42(23):4921-4924. doi: 10.1364/OL.42.004921.
We demonstrated a simple heart-shaped hole to tailor the axial intensity of a collimated laser beam. This hole is transformed from a soft-boundary one, which avoids the difficulty in fabricating the soft-boundary mask designed by the apodization method, as well as the interference problem caused by the pixel structure of the spatial light modulator. When a collimated light passes through this hole, its axial intensity oscillates less than 11% within a certain distance, while the fluctuation after the circular aperture is up to 200%. We compared the propagation of beams after this hole and a circular aperture experimentally and theoretically. The results show that this hole is a useful tool to get the laser beam with uniform axial intensity.
我们展示了一个简单的心形孔，用于调整准直激光束的轴向强度。这个孔是由软边界孔转变而来的，它避免了采用变迹法设计软边界掩模时的制造困难，以及空间光调制器像素结构引起的干涉问题。当准直光通过这个孔时，其轴向强度在一定距离内的振荡小于11%，而通过圆形孔径后的波动高达200%。我们通过实验和理论比较了光束通过这个孔和圆形孔径后的传播情况。结果表明，这个孔是获得轴向强度均匀的激光束的有用工具。
