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Doped-core octagonal photonic crystal fiber with ultra-flattened nearly zero dispersion and low confinement loss in a wide wavelength range

机译:掺杂核八角形光子晶体光纤,在宽波长范围内具有超扁平的接近零色散和低限制损耗

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摘要

In this article, an octagonal photonic crystal fiber is proposed, in which the core region and four air holes in the inner ring have a refractive index of 1.43. Compared with the hexagonal photonic crystal fiber, the octagonal photonic crystal fiber has less confinement loss. To study the propagation characteristics of the proposed photonic crystal fiber, the finite-difference time-domain method with perfectly matched layer boundary conditions has been used. By properly optimizing the design parameters of the proposed octagonal photonic crystal fiber, an ultra-flattened nearly zero dispersion of 0±0:1 psm.km in the wavelength range of 1.25 μm to 1.65 μm is made feasible, and for wavelengths shorter than 1.65 μm, confinement losses of less than 7 × 10-7 dB/km have been achieved.
机译:在本文中,提出了一种八边形光子晶体光纤,其中内圈的芯区和四个气孔的折射率为1.43。与六边形光子晶体光纤相比,八边形光子晶体光纤的约束损耗较小。为了研究所提出的光子晶体光纤的传输特性,使用了具有完美匹配层边界条件的时域有限差分法。通过适当地优化所提出的八边形光子晶体光纤的设计参数,可以在1.25μm至1.65μm的波长范围内实现超平坦的0±0:1 ps / nm.km的接近零色散,并且对于更短的波长如果小于1.65μm,则限制损耗小于7×10-7 dB / km。

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