High-power mid-infrared femtosecond master oscillator power amplifier Er:ZBLAN fiber laser system

作者：Lin-Peng Yu, Jin-Hui Liang, Qi Zeng, Jia-Chen Wang, Xing Luo, Jinzhang Wang, Peiguang Yan, Fan-Long Dong, Xing Liu, Qi-Tao Lu, Chun-Yu Guo, S. Ruan · 发表于：High Power Laser Science and Engineering · 年份：2023 · DOI：10.1017/hpl.2023.42 · 被引用次数：38

Abstract High-power femtosecond mid-infrared (MIR) lasers are of vast importance to both fundamental research and applications. We report a high-power femtosecond master oscillator power amplifier laser system consisting of a single-mode Er:ZBLAN fiber mode-locked oscillator and pre-amplifier followed by a large-mode-area Er:ZBLAN fiber main amplifier. The main amplifier is actively cooled and bidirectionally pumped at 976 nm, generating a slope efficiency of 26.9%. Pulses of 8.12 W, 148 fs at 2.8 μm with a repetition rate of 69.65 MHz are achieved. To the best of our knowledge, this is the highest average power ever achieved from a femtosecond MIR laser source. Such a compact ultrafast laser system is promising for a wide range of applications, such as medical surgery and material processing.