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应用多极法对正方晶格微结构光纤的损耗特性进行了数值模拟,研究了包层各层空气孔直径和包层空气孔层数在1.31μm和1.55μm处对损耗特性的影响。研究发现,通过选择高空气填充率的结构参数可以有效地降低光纤的损耗;通过增大最外层空气孔的直径或包层空气孔层数,可在保持色散特性不变的基础上显著降低光纤的损耗。文章的计算和分析可以为设计适当色散特性的低损耗微结构光纤提供理论依据。
The multi-pole method was used to simulate the loss characteristics of the square lattice microstructured fiber. The influence of the air hole diameter and the number of air holes on the loss characteristics at 1.31μm and 1.55μm was studied. It has been found that the loss of optical fiber can be effectively reduced by selecting the structural parameters of high air filling rate. By increasing the diameter of the outermost air hole or the number of air holes in the cladding layer, the loss of optical fiber can be significantly reduced while keeping the dispersion characteristics unchanged Optical fiber loss. The calculation and analysis of the article can provide a theoretical basis for the design of low-loss microstructured optical fiber with proper dispersion characteristics.