von Grafenstein L, Bock M, Ueberschaer D, Griebner U, Elsaesser T
Opt Lett. 2016 Oct 15;41(20):4668-4671. doi: 10.1364/OL.41.004668.
A 2 μm chirped pulse amplification source generates 55 mJ picosecond pulses at a 1 kHz repetition rate. The system consists of a high-gain Ho:YLF regenerative amplifier (RA) operating in the single-energy regime and a dual-rod Ho:YLF power amplifier. Pulses of ∼10 mJ energy from the RA are linearly scaled up to 55 mJ in the power amplifier, corresponding to a high overall extraction efficiency of >20%. The system displays an exceptional high stability with a pulse-to-pulse rms as low as 0.3%. Pulse compression is performed up to the 25 mJ energy level, resulting in pulses close to the Fourier-transform limit with a duration of 4.3 ps and a peak power of 4.4 GW.
一个2微米啁啾脉冲放大源以1千赫兹的重复频率产生55毫焦的皮秒脉冲。该系统由一个在单能模式下运行的高增益钬：钇锂氟化物再生放大器（RA）和一个双棒钬：钇锂氟化物功率放大器组成。来自RA的能量约为10毫焦的脉冲在功率放大器中线性放大至55毫焦，对应着大于20%的高整体提取效率。该系统显示出极高的稳定性，脉冲间均方根误差低至0.3%。脉冲压缩在25毫焦能量水平下进行，产生接近傅里叶变换极限的脉冲，脉宽为4.3皮秒，峰值功率为4.4吉瓦。
