针对目前广泛使用的G.652光纤中存在的色散问题,设计了一种圆形结构的双芯色散补偿型光子晶体光纤,并运用COMSOL Multiphysics 4.4对其进行仿真模拟。研究表明,当空气孔孔径d增大时,色散的最小值会向长波长区移动,同时最小色散值的绝对值会逐渐增大;当层与层间距Λ增大时,色散的最小值会向长波长区移动,但是最小色散值的绝对值会逐渐减小;当填充液体折射率nL增大时,色散的最小值会向短波长区移动,同时最小色散值的绝对值会逐渐增大。当d=1.140μm,Λ=1.500μm,nL=1.350时,在传输波长1 550nm处可以得到大约-17 000ps/(nm·km)的大负色散值,可以对相当于自身长度850倍的G.652单模光纤进行色散补偿。 Aiming at the dispersion problem in the widely used G.652 fiber, a two-core dispersion compensation photonic crystal fiber with circular structure was designed and simulated by COMSOL Multiphysics 4.4. The results show that when the air hole diameter d increases, the minimum dispersion will move to the long wavelength region, meanwhile the absolute value of the minimum dispersion will gradually increase. When the layer spacing Λ increases, the minimum dispersion will To the long wavelength region, but the absolute value of the minimum dispersion value gradually decreases. When the refractive index nL of the filled liquid increases, the minimum value of the dispersion shifts to the short wavelength region while the absolute value of the minimum dispersion value gradually increases . When d = 1.140μm, Λ = 1.500μm, nL = 1.350, a large negative dispersion value of -17000ps / (nm · km) can be obtained at the transmission wavelength of 1 550nm, and the G .652 single-mode fiber for dispersion compensation.