500 W rod-type 4 x 4 multicore ultrafast fiber laser

We present a coherently combined femtosecond fiber chirped-pulse-amplification system based on a rod-type, ytterbium-doped, multicore fiber with 4x4 cores. A high average power of up to 500 W (after combination and compression) could be achieved at 10 MHz repetition rate with excellent beam quality. Additionally, < 500 fs pulses with up to 600 mu J of pulse energy were also realized with this setup. This architecture is intrinsically power scalable by increasing the number of cores in the fiber. (C) 2022 Optica Publishing Group

Automated summary

In this paper, a coherently combined femtosecond fiber chirped-pulse-amplification system based on a multicore fiber is presented, which demonstrates excellent performance in terms of high power and pulse energy. The system is scalable by increasing the number of cores in the fiber.