Simović Ana, Djordjevich Alexandar, Savović Svetislav
University of Kragujevac, Faculty of Science, Kragujevac, Serbia
Appl Opt. 2012 Jul 10;51(20):4896-901. doi: 10.1364/ao.51.004896.
For different depth and width of the intermediate layer, a power flow equation is used to calculate spatial transients and steady state of power distribution in W-type optical fibers (doubly clad fibers with three layers). A numerical solution has been obtained by the explicit finite difference method. Results show how the power distribution in W-type optical fibers varies with the depth of the intermediate layer for different values of intermediate layer width and coupling strength. We have found that with increasing depth of the intermediate layer, the fiber length at which the steady-state distribution is achieved increases. Such characterization of these fibers is consistent with their manifested effectiveness in reducing modal dispersion and improving bandwidth.
对于中间层不同的深度和宽度，采用功率流方程来计算W型光纤（三层双包层光纤）中功率分布的空间瞬态和稳态。通过显式有限差分法获得了数值解。结果表明，对于中间层宽度和耦合强度的不同值，W型光纤中的功率分布如何随中间层深度而变化。我们发现，随着中间层深度的增加，达到稳态分布的光纤长度增加。这些光纤的这种特性与它们在减少模式色散和提高带宽方面所表现出的有效性是一致的。
