Milli-joule class femtosecond regenerative amplifier enabled by a narrowband fiber oscillator

被引:2
作者
Guo, Zhengru [1 ,3 ]
Liu, Zhaocun [1 ]
Liu, Tingting [2 ]
Shao, Yumin [3 ]
Li, Min [1 ]
Hao, Qiang [1 ]
机构
[1] Univ Shanghai Sci & Technol, Sch Opt Elect & Comp Engn, Shanghai 200093, Peoples R China
[2] East China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China
[3] East China Normal Univ, Chongqing Inst, Chongqing 401123, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
Ultrashort pulse laser; Yb-doped laser; Regenerative amplification; Nonlinear amplification; AVERAGE POWER; PULSE; FS; AMPLIFICATION; COMPRESSION; GENERATION; REGIME; YB; MJ;
D O I
10.1016/j.infrared.2023.105067
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
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 7folded 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.
引用
收藏
页数:5
相关论文
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