Highly nonlinear photonic crystal fibers (PCFs) can be used as a kind of new ways to realize the supercontinuum generation because of their highly nonlinear effects. Based on a type of material-filled method and structure, novel highly nonlinear PCFs are proposed to compare with the conventional highly nonlinear fiber for supercontinuum generation in this manuscript. The nonlinear coefficient and supercontinuum spectra varying with different parameters such as the hole-diameter, the hole-pitch and the refractive index of the filled material are investigated respectively and analyzed numerically. Even if lower incident optical power is used on the designed PCFs than that on the conventional fiber and the previous proposed PCFs, broadband supercontinuum can still be obtained easily from highly nonlinear effects. The results demonstrate that it is possible for this kind of novel PCFs to achieve the maximum 450 nm supercontinuum spectra, even though it is only 50-cm-long fiber and pumped by substantially lower incident optical power of 1.5 W near the wavelength of 1.55 µm.

中文翻译：

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基于低入射光功率填充结构光子晶体光纤的宽带超连续谱产生

高度非线性光子晶体光纤（PCFs）由于其高度非线性效应，可以作为一种新的实现超连续谱产生的途径。基于一种材料填充的方法和结构，本文提出了新型的高度非线性 PCF，以与用于超连续谱生成的传统高度非线性光纤进行比较。分别对填充材料的孔径、孔距和折射率等不同参数的非线性系数和超连续谱进行了研究和数值分析。即使在设计的 PCF 上使用的入射光功率低于传统光纤和先前提出的 PCF，宽带超连续谱仍然可以从高度非线性效应中轻松获得。