掺铒光子晶体光纤非线性的研究

为了研究光子晶体光纤的纤芯中掺稀土离子Er3+后对其非线性系数的影响,采用全矢量等效折射率模型的方法,通过对空气孔半径r、空气孔间距Λ、等效纤芯的折射率n和空气填充率等结构参量的调节,对非线性系数随这些参量的变化进行了数值计算和讨论,得到了结构参量对非线性的影响及其变化规律。结果表明,在光子晶体光纤的纤芯中掺稀土离子Er3+,可以提高光子晶体光纤的非线性;通过调节结构参量,可以灵活地调整掺铒光子晶体光纤的非线性,从而能够得到更具实用价值的光子晶体光纤。

Nonlinear properties of erbium-doped photonic crystal fibers

Multi energy-level laser system can be acquired by doping rare-earth ion Er3+ in Sio2 optical fiber.As be pumped by light-source,inputting signal is magnified directly.Erbium-doped fiber has lager refractive index.On this paper,a vector effective index model is used to analyze the characteristic of the nonlinear coefficient on the structural parameters of erbium-doped fibers. Much more applied value photonic crystal fiber can be obtained by varying the structural parameters(including hole-to-hole spacing,Air hole-to-hole radius and refractive index of fiber core) to adjust the nonlinearity of photonic crystal fibers.