Flexible generation of femtosecond cylindrical vector beams (Invited Paper)
Flexible generation of femtosecond cylindrical vector beams (Invited Paper)
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DOI：
10.3788/col201715.030007
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发表时间：
2017-02
影响因子：
3.5
通讯作者：
Yuquan Zhang;Xiujie Dou;Yong Yang;C. Xie;J. Bu;C. Min;and Xiaocong Yuan;Xiaocong Yuan
中科院分区：
文献类型：
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作者：
Yuquan Zhang;Xiujie Dou;Yong Yang;C. Xie;J. Bu;C. Min;and Xiaocong Yuan;Xiaocong Yuan
近年来，飞秒柱面矢量光束在许多应用中得到了应用。然而，现有的刚性生成方法严重限制了其发展。在这里，我们提出了一种灵活的方法，产生具有任意偏振阶数的fs-CVB采用半波片和涡流延迟器。测量并比较了输入和产生的CVB脉冲的偏振态、自相关宽度、脉冲宽度和光谱特性。结果表明，产生的CVB保持在fs制度，没有明显的时间失真，能量转换效率可以高达96.5%，即使是三阶光束。作为一种灵活的生成fs-CVB的方法，该方法具有重要的应用价值。
Femtosecond (fs) cylindrical vector beams (CVBs) have found use in many applications in recent years. However, the existing rigid generation methods seriously limit its development. Here, we propose a flexible method for generating fs-CVBs with arbitrary polarization order by employing half wave plates and vortex retarders. The polarization state, autocorrelation width, pulse width, and spectrum features of the input and generated CVB pulses are measured and compared. The results verify that the generated CVBs remain in the fs regime with no appreciable temporal distortion, and the energy conversion efficiency can reach as high as 96.5%, even for a third-order beam. As a flexible way to generate fs-CVBs, this method will have great significance for many applications.