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传统有效折射率方法只能模拟具有相同空气孔大小的单包层光子晶体光纤.针对这一问题,提出了一种改进的有效折射率法,能够计算具有不同孔径的多包层光子晶体光纤的传输特性.并用此方法对三包层光子晶体光纤的基模有效折射率和色散等特性进行了数值模拟,结果与多极法模拟出的结果符合得很好.这种改进的有效折射率法拓展了传统有效折射率法的适用范围,对快速准确地分析和设计具有不同传输特性的多包层光子晶体光纤提供了理论依据.
The traditional effective refractive index method can only simulate single-clad photonic crystal fiber with the same air-hole size. In response to this problem, an improved effective refractive index method is proposed, which can calculate multi-clad photonic crystal fibers with different aperture And the characteristics of the effective refractive index and dispersion of the fundamental mode of the triple-clad photonic crystal fiber are numerically simulated with this method, and the results are in good agreement with the results of the multipole method. The improved effective refractive index It expands the applicable range of the traditional effective refractive index method and provides a theoretical basis for the fast and accurate analysis and design of multi-clad photonic crystal fibers with different transmission characteristics.