Kuhlmey Boris T, McPhedran Ross C, Martijn de Sterke C
Opt Lett. 2002 Oct 1;27(19):1684-6. doi: 10.1364/ol.27.001684.
We analyze the nature of modal cutoff in microstructured optical fibers of finite cross section. In doing so, we reconcile the striking endlessly single-mode behavior with the fact that in such fibers all propagation constants are complex. We show that the second mode undergoes a strong change of behavior that is reflected in the losses, effective area, and multipolar structure. We establish the parameter subspace in which the fibers are single mode and an accurate value for the limit of the endlessly single-mode regime.
我们分析了有限横截面微结构光纤中模态截止的性质。在此过程中，我们将这种引人注目的无限单模行为与此类光纤中所有传播常数均为复数这一事实协调起来。我们表明，第二模式经历了行为上的强烈变化，这反映在损耗、有效面积和多极结构中。我们确定了光纤为单模的参数子空间以及无限单模区域极限的精确值。
