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本文对具有 Kerr非线性包层和线性匀芯的光纤在不同光功率下的传播特性进行了理论分析和数值计算 .结果表明 ,在适当光功率下 ,当模折射率 N等于芯折射率 nf 时 ,芯场变得相当均匀 ,而包层场迅速衰减 .对于自聚焦包层 ,当从 N nf时 ,芯场剖面越过 N =nf从凸变凹 .在拐点 ,芯场成为均匀的 .论文给出了模场分布和光功率与模折射率的关系 .指出纤芯出现匀场预期会在光纤器件、光电子器件、光子器件中得到应用
In this paper, the propagation and propagation of optical fiber with Kerr nonlinear cladding and linear uniform core under different optical powers are theoretically analyzed and numerically calculated. The results show that under the proper optical power, when the modal index N is equal to the core refractive index nf , The core field becomes fairly uniform and the cladding field decays rapidly. For the self-focusing cladding, the core field crosses N = nf from convex to concave when going from N nf. At the inflection point, the core The field becomes uniform.The paper gives the relationship between mode field distribution and optical power and mode refractive index.It is pointed out that the shimming of core appears in optical fiber devices, optoelectronic devices and photonic devices