Karasawa Naoki
Chitose Institute of Science and Technology, Chitose, Japan.
Appl Opt. 2012 Jul 20;51(21):5259-65. doi: 10.1364/AO.51.005259.
Dispersion properties of liquid-core photonic crystal fibers (PCFs) with large air fraction in clads between 300 to 2000 nm have been calculated by a multipole method for various liquids including CS(2), toluene, chloroform, and water for different core diameters. In calculations, air holes are assumed to be arranged in a regular hexagonal array in fused silica, and a central hole is filled with liquid to create a core. The results are compared with those obtained by a fully vectorial effective index method, and fitting parameters for core sizes are found for each liquid except for water, where the latter method does not give correct dispersions at short wavelengths. Also, the power ratios inside liquid cores and effective core areas were calculated at different wavelengths.
采用多极方法计算了包层中空气占比大的液芯光子晶体光纤（PCF）在300至2000纳米波长范围内的色散特性，其中包括二硫化碳（CS₂）、甲苯、氯仿和水等各种液体，针对不同的纤芯直径进行了计算。在计算中，假设空气孔在熔融石英中呈规则六边形阵列排列，中心孔填充液体以形成纤芯。将结果与通过全矢量有效折射率方法获得的结果进行了比较，除水之外，针对每种液体都找到了纤芯尺寸的拟合参数，因为在短波长下后一种方法无法给出正确的色散结果。此外，还计算了不同波长下液芯内部的功率比和有效纤芯面积。
