光学
放大器
飞秒
材料科学
窄带
放大
脉冲持续时间
飞秒脉冲整形
激光器
再生放大
光纤激光器
脉搏(音乐)
光电子学
物理
光放大器
探测器
CMOS芯片
作者
Zhengru Guo,Zhaocun Liu,Tingting Liu,Yang Shao,Min Li,Qiang Hao
标识
DOI:10.1016/j.infrared.2023.105067
摘要
We report on a room-temperature operated, Yb:CaF2 based, chirped-pulse regenerative amplifier system with a pulse duration of 300 fs and an output pulse energy of 2.0 mJ. A novel front end comprising a narrowband fiber oscillator and a nonlinear fiber amplifier is adopted to seed the regenerative amplifier. To achieve broadband spectral coverage for femtosecond pulse generation, nonlinear fiber amplification is implemented and spurs a 7-folded spectral extension. After the successive pulse stretching, spectral reshaping, regenerative amplifying, and compressing, optimum pulses with 300-fs duration and 6.7-GW peak power are obtained. Such intense pulses are capable of inducing laser filament at 0.4-mJ energy with a loosely focusing geometry. Our method demonstrates the potential of narrowband fiber lasers to enable femtosecond regenerative amplifiers and paves the way toward compact, robust, and cost-effective millijoule-class lasers.
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