Mikoshiba K, Kajioka H
Appl Opt. 1978 Sep 1;17(17):2836-41. doi: 10.1364/AO.17.002836.
The transmission mechanism of a multimode W-type optical fiber is clarified by the experimental study of the effect of the intermediate layer on the transmission characteristics. It is shown that control of the layer width is an effective means for achieving the desired loss and bandwidth. A W-type fiber with a thick intermediate layer has a transmission loss on the order of 2 dB/km. To determine the transmission characteristics of a W-type fiber applicable to system design, the length dependence of several fiber characteristics is investigated. Concepts such as splices used as mode scramblers and the effect of the intermediate layer as a barrier against OH absorption loss are introduced. The wavelength dependence of microbending loss of a W-type fiber is also described.
通过对中间层对传输特性影响的实验研究，阐明了多模W型光纤的传输机制。结果表明，控制层宽是实现所需损耗和带宽的有效手段。具有厚中间层的W型光纤的传输损耗约为2 dB/km。为了确定适用于系统设计的W型光纤的传输特性，研究了几种光纤特性的长度依赖性。引入了用作模式扰频器的熔接以及中间层作为防止OH吸收损耗屏障的作用等概念。还描述了W型光纤微弯损耗的波长依赖性。
