Skorobogatiy Maksim, Guo Ning
Ecole Polytechnique de Montréal, Génie Physique, Québec, Canada.
Opt Lett. 2007 Apr 15;32(8):900-2. doi: 10.1364/ol.32.000900.
In multimode bandgap guiding fibers higher-order modes have high radiation losses. Once excited, after a short propagation distance such modes are leaked out of the fiber core. Reduction of the number of excited modes in the fiber core leads to a decrease of intermodal dispersion and a dramatic enhancement of fiber bandwidth. Due to the increase in the propagation loss, bandwidth enhancement by differential mode attenuation also leads to the reduction of the maximal length of a usable fiber span. We demonstrate that by proper design of a photonic crystal reflector long fiber spans of high bandwidth are possible.
