(2+1)D Spatiotemporal Characterization of Nonlinear Interactions between Selectively Excited Spatial Modes of a Few-Mode Fiber

Abstract

We present a novel approach to measure nonlinear interaction between selectively-excited modes of few-mode fibers. Selective excitation is achieved by end-facet patterning; spatiotemporal measurements are performed by raster-scanning a near-field probe coupled to high-speed detection.