Hemmer M, Sánchez D, Jelínek M, Smirnov Vadim, Jelinkova H, Kubeček V, Biegert J
Opt Lett. 2015 Feb 15;40(4):451-4. doi: 10.1364/OL.40.000451.
A 2-μm wavelength laser delivering up to 39-mJ energy, ∼10 ps duration pulses at 100-Hz repetition rate is reported. The system relies on chirped pulse amplification (CPA): a modelocked Er:Tm:Ho fiber-seeder is followed by a Ho:YLF-based regenerative amplifier and a cryogenically cooled Ho:YLF single pass amplifier. Stretching and compressing are performed with large aperture chirped volume Bragg gratings (CVBG). At a peak power of 3.3 GW, the stability was <1% rms over 1 h, confirming high suitability for OPCPA and extreme nonlinear optics applications.
据报道，一种波长为2μm的激光器，能以100Hz的重复频率输出能量高达39mJ、脉宽约10ps的脉冲。该系统采用啁啾脉冲放大（CPA）技术：一个锁模的铒镱铥光纤种子源后面跟着一个基于钬钇锂氟化物（Ho:YLF）的再生放大器和一个低温冷却的Ho:YLF单程放大器。拉伸和压缩通过大孔径啁啾体布拉格光栅（CVBG）进行。在3.3GW的峰值功率下，1小时内的稳定性均方根误差（rms）<1%，这证实了其非常适合用于光参量啁啾脉冲放大（OPCPA）和极端非线性光学应用。
