Overcoming limitations in high power fiber laser systems

Fiber laser systems have demonstrated an unprecedented power-scaling, being currently the solid-state laser concept delivering the highest average power with diffraction limited beam quality.This power scalability could only be unlocked by finding creative solutions to the multiple limitations (non-linear and thermal) of fibers.In this talk we will review such limitations and the most recent advances in their understanding and mitigation, including the most recent research on multicore fibers.