Maeda M, Yamada S
Appl Opt. 1977 Aug 1;16(8):2198-203. doi: 10.1364/AO.16.002198.
The mode structure of a W-fiber has been discussed in conjunction with that of an SC-fiber using the WKB approximation, and the leaky mode attenuation coefficient has been derived using Poynting's vector theorem. Furthermore, a simplified expression for the attenuation coefficient of the W-fiber has been obtained and compared with that of the SC-fiber. Comparisons between the calculated and measured spatial transient responses have also been carried out and shown to agree well with each other. The results are useful in the study of W-fiber properties.
利用WKB近似方法，结合单模光纤（SC-fiber）的模式结构对W型光纤的模式结构进行了讨论，并使用坡印廷矢量定理推导了泄漏模式衰减系数。此外，还得到了W型光纤衰减系数的简化表达式，并与单模光纤的衰减系数进行了比较。还对计算得到的和测量得到的空间瞬态响应进行了比较，结果表明二者吻合良好。这些结果对于W型光纤特性的研究具有重要意义。
