Spatiotemporal Wave Pattern Stabilization by Graded Dissipation in Multimode Fibers

Recent progress in mastering multidimensional nonlinear wave patterns has an interdisciplinary character. It bridges different areas, ranging from nonlinear wave collapse and turbulence phenomena in plasmas, the formation of highly coherent structures, such as solitons in nonlinear optics (so-called "light bullets"), to liquid crystals and Bose-Einstein condensates (BECs) [1] – [3] . Such soliton-like structures could provide unprecedented energy condensation, and lead to a breakthrough in the information capacity of photonic networks and multimode microresonators for optical comb generation [4] – [6] . Here we numerically demonstrate that multidimensional wave pattern stabilization can be substantially enhanced by introducing graded dissipation in a multimode fiber (MMF), which is closely connected with the concept of distributed Kerr-lens mode-locking in an all-fiber lasers [7] .