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Numerical investigation on a new designed hollow-core photonic crystal fiber with large modal separation

机译：新型大模态分离中空光子晶体光纤的数值研究

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摘要

We investigate the characteristics of optical modes in a new designed hollow-core photonic crystal fiber (PCF) with large modal separation. The large effective refractive index difference between the adjacent second-order vector modes can be maintained higher than 0.001 within the wavelength range from 1 to 2 mu m. The maximum value can arrive 0.01199 between HE21 and TM01 mode at 2 mu m. The fundamental mode of the proposed PCF has flat dispersion in a wide spectral range, which can be applied on wideband supercontinuum generation. The influence on the characteristics by the PCF structure has also been investigated. The increase of the size of the central air hole and the duty cycle affects the flatness of the dispersion curve to some extent. Our simulated results could provide an optimized fiber structure for the experimental study on stable transmission of vector modes.
机译：我们研究了具有大模态分离的新型设计的中空光子晶体光纤（PCF）的光学模式特性。在1至2μm的波长范围内，可以将相邻的二阶矢量模式之间的有效折射率差维持在大于0.001。 HE21和TM01模式之间的最大值在2μm时达到0.01199。提出的PCF的基本模式在较宽的光谱范围内具有平坦的色散，可以应用于宽带超连续谱的产生。还研究了PCF结构对特性的影响。中央气孔的尺寸和占空比的增加在一定程度上影响色散曲线的平坦度。我们的仿真结果可以为矢量模式稳定传输的实验研究提供优化的光纤结构。

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