研究发现包层膜有效折射率、直流耦合系数及奇数阶次的交流耦合系数都随着波长的增加而减小。
It is revealed that the effective refractive index and the DC coupling coefficient, as well as the ac coupling coefficient of odd order modes, will be decreased with the increase in wavelengths.
推导出纤芯、包层、薄膜层、环境层的场分布表达式，利用数值计算求出了包层膜的有效折射率。
Resolve dispersion equation and obtain the effective refractive index of cladding using method of numerical calculation.
拉伸膜捆包层数以4层为宜。
拉伸膜捆包层数以4层为宜。
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