【摘要】 设计了几种在较宽的通信区域色散平坦的准光子晶体光纤(PQF),借助于全矢量有限元法,分别研究了基于双包层结构的2种准晶格光子晶体光纤的色散特性。数值模拟结果指出:对于PQF1,通过合理选择结构的参数,在光通信窗口1.45～1.65μm的范围内准光子晶体光纤的色散数值可以控制在-2.41±0.28ps/(km.nm)。小幅度增大孔间距,可在1.350～1.736μm的较宽波长范围内得到一条近零平坦色散曲线,其色散值|D|可以控制在1 ps/(km.nm)左右,达到-0.45～0.57 ps/(km.nm)。对于PQF2,在1.45～1.68μm的范围内其色散值可以控制在4.795±0.355 ps/(km.nm)。更多还原

【Abstract】 Several new photonic quasicrystal fibers(PQFs) with ultra-flattened chromatic dispersion at wide range of the telecommunication-window are presented.Based on the full vectorial model,the finite element method is adopted to analyze the dispersion properties of photonic quasicrystal fiber with double-clad structure.According to the numerical simulation results of the PQF1,the dispersion of the photonic quasicrystal fiber can be controlled within-2.41±0.28 ps/(km·nm) in 1.45~1.65 μm optical communication-window.Afterwards,we get a near-zero flattened dispersion curve by increasing the hole spacing.In a wide wavelength range from 1.350 to 1.736 μm,the region of dispersion variation is from-0.45 to 0.57 ps/(km·nm).For PQF2,the dispersion value can be controlled within 4.795±0.355 ps/(km·nm) by adjusting the parameters in the wavelength range of 1.45 to 1.68 μm.更多还原