宽带色散补偿光子晶体光纤的优化设计

Design and Optimization of Photonic Crystal Fiber with Broad Band Dispersion Compensating

设计了一种宽带色散补偿光子晶体光纤,此光子晶体光纤在整个C波段具有较大的负色散值,且其色散斜率值均为负值。通过合理选取光子晶体光纤的层数和孔间距,同时优化各层的空气孔直径大小,分别设计了在1 550nm附近的色散值为-425、-440和-400ps.km-1.nm-1;且色散斜率分别为-1.49、-4.31和-8.59ps.km-1.nm-2的宽带色散补偿光子晶体光纤。可以分别实现与G.652和G.655光纤的卡帕值和相对色散斜率相匹配,具有较好的宽带色散补偿能力。

A photonic crystal fiber with broad band dispersion compensating is proposed. The photonic crystal fiber has high negative dispersion over C telecommunication wavelength band, and its dispersion slope is negative. By choosing the appropriate number of rings of the outer core and pitch, and adjusting the diameter of the inter air holes, photonic crystal fibers with broad band dispersion compensating are obtained. The dispersion value is -425, -440 and -400 ps· km 1 . nm^-1, respectively. The dispersion slope is -1.49, -4.31 and -8.59 ps ·km^-1·nm^-2 , respectively. They can achieve good match with kappa and relative dispersion slope for G. 652 and G. 655 fibers, and can achieve good compensations for broadband communication.