提出了利用掺氟同心圆环的光纤结构来提高光子晶体光纤(PCF)的非线性,所需控制的参量仅有两个。设计了三种具有高非线性、低色散斜率和低限制损耗的全固光子晶体光纤。这三种光纤分别具有正常色散、双零色散点和零色散点恰好在1.55μm波长处的色散曲线特性。所设计的零色散点恰好在1.55μm波长处的光子晶体光纤色散斜率值为5.12×10-4 ps/(km·nm2),这比传统的高非线性光纤的色散斜率小了2个数量级。同时,该光纤在1.55μm波长处的非线性系数为31.5W-1·km-1,限制损耗为9.62×10-5 dB/km。 Proposed the use of fluorine-doped concentric rings of fiber structure to improve the photonic crystal fiber (PCF) nonlinearity, the required control of only two parameters. Three all-solid photonic crystal fibers with high nonlinearity, low dispersion slope and low limit loss are designed. The three fibers have the dispersion characteristics of normal, double zero and zero dispersion, respectively, at a wavelength of 1.55 μm. The chromatic dispersion slope of the photonic crystal fiber with the zero-dispersion point at the wavelength of 1.55μm is 5.12 × 10-4 ps / (km · nm2), which is two orders of magnitude smaller than that of the conventional high-nonlinearity fiber. Meanwhile, the nonlinear coefficient of the optical fiber at the wavelength of 1.55μm is 31.5W-1km-1, and the limit loss is 9.62 × 10-5 dB / km.