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利用多极法对光子晶体光纤的色散特性进行了模拟,通过设计合适的结构参数,得到了具有3个零色散波长的单模光纤.对中心纤芯有1个微小空气孔光子晶体光纤的色散特性进行了分析,设计出了具有4个零色散波长的色散曲线.分析了零色散波长随光纤结构的变化规律,这些零色散波长的位置和间距可以在很大波长范围内灵活调节.具有多个零色散波长的光纤可以得到色散值极低的超平坦色散曲线.多个零色散波长光纤能产生丰富的相位匹配曲线,可以有效地控制光孤子及超短脉冲的四波混频及共振散射产生的光谱特性.
The multi-pole method is used to simulate the chromatic dispersion of photonic crystal fiber. By designing suitable structure parameters, a single-mode fiber with 3 zero-dispersion wavelengths is obtained. The dispersion of a tiny air-hole photonic crystal fiber Characteristics were analyzed and the dispersion curve with 4 zero dispersion wavelengths was designed.The variation of zero dispersion wavelength with the optical fiber structure was analyzed.The position and spacing of these zero dispersion wavelengths can be flexibly adjusted in a wide range of wavelength.However, A zero dispersion wavelength fiber can obtain a very low dispersion value of the ultra-flat dispersion curve.Multiple zero-dispersion wavelength fiber can produce rich phase matching curve, which can effectively control the optical soliton and ultrashort pulse four-wave mixing and resonance scattering The resulting spectral characteristics.