Multi-core fibers are a technology currently at the forefront of research due to the increasing need for efficient transport of high-power continuous and pulsed laser beams , Power scaling is gained by propagating independent beams through spatial multiplexing in different cores to avoid thermal instability issues , shifting the traditional trade-off involved in enlarging the mode area while preserving single-mode operation. Phase difference compensation between the various beams is achieved by a piezo mirror system, and experimental results show that onset of multi-modality in heated cores is one of the main causes of efficiency reduction .
Phasing and guidance properties of multi-core fibers under heat load / Rosa, L.; Mckee, S.; Molardi, C.; Poli, F.; Selleri, S.; Vincetti, L.; Cucinotta, A.. - 2019:(2019), pp. 1-1. (Intervento presentato al convegno 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 tenutosi a Munich, GERMANY nel JUN 23-27, 2019) [10.1109/CLEOE-EQEC.2019.8872616].