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本文建立了有机晶体芯层光纤和有机包层光纤的分析模型,并对这两种模型进行了模式分析,导出了各类模型的色散方程,然后应用耦合模理论对这两种模型中的非线性互作用进行了讨论,得出了二次谐波转换效率公式.在此基础上,数值计算了二次谐波转换效率和影响它的因素之间的关系,结果指出有机光纤可以利用它们的模式色散特性实现相位匹配,从而产生较强的二次谐波.
In this paper, the analytical model of organic crystal core optical fiber and organic clad optical fiber is established, and the mode analysis of these two models is carried out. The dispersion equations of various models are deduced. Then, the coupling mode theory is used to analyze the non- Linear interaction is discussed and the second harmonic conversion efficiency formula is obtained.On this basis, the relationship between the second harmonic conversion efficiency and the factors affecting it is numerically calculated and the results show that the organic optical fiber can use their Mode dispersion characteristics to achieve phase matching, resulting in strong second harmonic.