Single-Polarization Single-Mode Photonic Crystal Fibers With Uniformly Sized Air Holes
Single-Polarization Single-Mode Photonic Crystal Fibers With Uniformly Sized Air Holes
复制标题
具有均匀尺寸气孔的单偏振单模光子晶体光纤
DOI：
10.1109/jlt.2020.3029790
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发表时间：
2020-10
影响因子：
4.7
通讯作者：
Zhiwei Li
中科院分区：
文献类型：
--
作者：
Dunke Lu;Xiaohui Fang;Xiaohang Li;Zhiwei Li
我们提出了一种新颖的光子晶体光纤设计来实现单偏振单模传输。本设计的拓扑出于简单和稳定的考虑，仅采用大小均匀的圆形气孔，并且它们都在纯二氧化硅背景中规则地网格化。采用全矢量有限元方法，结合完美匹配层作为吸收边界条件，研究导向特性。已经发现，增加孔距比可以加宽SPSM带，然而，受限于该比值应当不足以打开带隙。此外，还深入研究了环数和内包层覆盖对传输特性的影响。优化的样品经过精心设计，可提供宽度为 120 nm 的 SPSM 谱带，中心位于 \\boldsymbol $\lambda = $ 1.55 μm。此外，所提出的设计表现出低限制损耗、高非线性系数以及优异的抗弯曲性。
We propose a novel design of photonic crystal fiber to achieve the single-polarization single-mode transmission. The topology of this design only employs, with a view of simplicity and stability, uniformly sized circular air holes, and they are all regularly latticed in a pure-silica background. Guiding properties are studied by use of the full-vector finite element method, combined with perfectly matched layers as absorbing boundary conditions. It has been found that, increasing the hole-to-pitch ratio can be performed to broaden the SPSM band, however, subject to a qualification that the ratio should be inadequate to open a bandgap. In addition, influences of the ring number and the inner cladding coverage on transmission characteristics have been thoroughly investigated. An optimized sample is deliberately designed to offer an SPSM band with width of 120 nm, centered at \\boldsymbol $\lambda = $ 1.55 μm. Moreover, the proposed design demonstrates low confinement loss, high nonlinear coefficient, as well as excellent bending resistance.
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