提出了以硅为基质、高折射率铋化合物作为纤芯的多固体芯集束型光子晶体光纤(PCF)。该类光纤利用全内反射型机制将传输光场约束在高折射率固体棒芯中,并能输出相同强度的光。通过数值模拟分析了集束六芯六角形和集束八芯四方形两种光子晶体光纤的有效模场面积和非线性系数随抽运波长以及纤芯直径的变化规律,证明了这种光纤同时具有等效的高非线性和大的有效模场面积的特性,可以用于实现高功率频率变换。 A multi-solid core-bundle photonic crystal fiber (PCF) with a silicon-based and high-refractive-index bismuth compound as a core is proposed. This type of fiber utilizes a total internal reflection mechanism to confine the transmission light field in a solid core of high refractive index and to output light of the same intensity. The effective mode field area and nonlinear coefficient of the two types of PCF and PCF octagonal quadrupole photonic crystal fiber are analyzed by numerical simulation. The variation law with the pumping wavelength and the core diameter shows that the fiber has the same The effect of high nonlinearity and large effective mode-field area characteristics can be used to achieve high-power frequency conversion.