光子晶体光纤色散补偿特性的数值研究

Numerical study on dispersion compensating property in photonic crystal fibers

利用矢量有效折射率方法对光子晶体光纤 (PCF)的色散补偿特性进行了数值模拟 ,研究发现通过调节光子晶体光纤包层的空气穴节距或空气穴大小可以灵活地设计光子晶体光纤的色散系数D、色散斜率Dslope以及κ值 ,可以设计在波长 1 5 5 μm附近具有较大绝对值的正常色散和负色散斜率的色散补偿光子晶体光纤 ,使光通信中的普通单模光纤 (G .6 5 2 )或非零色散位移光纤 (G .6 5 5 )在 1 5 5 μm低损耗窗口得到较好的色散补偿 .

The dispersion compensating property in photonic crystal fibers (PCFs) is simulated with a vectorial effective index approach in this paper. It is found that the dispersion, dispersion slope, and Kappa parameter of PCFs can be designed neatly by changing the air hole size and the pitch in PCFs cladding. We can obtain PCFs with large absolute value of normal dispersion and negative dispersion slope at the wavelength of 1 55μm. Conventional communication nonshifted single mode fibers (G652) and nonzero dispersion shifted fibers (NZ DSF,G655) can be compensated efficiently at wavelengths around 1 55μm low loss optical communication window. It is demonstrated that there are huge potentials in designing dispersion compensating PCFs.