Design of Multicore Photonic Crystal Fibers to Generate Cylindrical Vector Beams
Design of Multicore Photonic Crystal Fibers to Generate Cylindrical Vector Beams
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DOI：
10.1109/jlt.2015.2503359
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发表时间：
2016-02
影响因子：
4.7
通讯作者：
Chenyang Zhao;Xuetao Gan;Peng Li;Liang Fang;Lei Han;Luqi Tu;Jianlin Zhao
中科院分区：
文献类型：
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作者：
Chenyang Zhao;Xuetao Gan;Peng Li;Liang Fang;Lei Han;Luqi Tu;Jianlin Zhao
提出了一种利用多芯光子晶体光纤产生柱面矢量光束的方法。在六芯光子晶体光纤中，各芯的光场呈现出不同的偏振态，从而产生矢量模的合成。通过在包层区域引入小缺陷空气孔和在纤芯周围扩大空气孔来控制模式偏振，分别获得了具有低传输损耗和高模式选择性的方位和径向偏振模式。此外，通过调节包层缺陷内空气孔的直径，可以简单地调谐矢量光束的工作波长范围。对光纤输出的远场进行了研究，得到了理想的空芯光强分布。基于光子晶体光纤的矢量光束发生器可以将矢量光束的应用扩展到全光纤结构中，使矢量光束的应用更加方便。
We propose a method to generate cylindrical vector beams (CVBs) using a specially designed multicore photonic crystal fiber (PCF). In a PCF with six cores arranged symmetrically around the fiber axis, the light fields in the cores present different polarization states, promising the compositions of vector modes. By introducing small defect airholes in the cladding region and enlarging airholes around the cores to control the mode polarizations, azimuthally and radially polarized modes are obtained separately with low propagation loss and high mode selectivity. In addition, the operation wavelength range of the vector beams can be tuned simply by adjusting the diameters of air-holes inside the cladding defect. The far fields of the fiber outputs are studied as well, which show perfect CVBs with hollow-core intensity profiles. The PCF-based CVB-generator could make the applications of vector beams much more convenient by extending it into the all-fiber structure.