水窗
光学
放大器
激光器
物理
放大
波长
高次谐波产生
脉搏(音乐)
材料科学
光电子学
超短脉冲
CMOS芯片
探测器
作者
Justinas Pupeikis,Pierre-Alexis Chevreuil,N. Bigler,L. Gallmann,C. R. Phillips,U. Keller
出处
期刊:Optica
[Optica Publishing Group]
日期:2019-12-24
卷期号:7 (2): 168-168
被引量:103
标识
DOI:10.1364/optica.379846
摘要
Coherent soft x-ray (SXR) sources enable fundamental studies in the important water window spectral region. Until now, such sources have been limited to repetition rates of 1 kHz or less, which restricts count rates and signal-to-noise ratio for a variety of experiments. SXR generation at high repetition rate has remained challenging because of the missing high-power infrared laser sources to drive the high-harmonic generation (HHG) process. Here we present an optical parametric chirped pulse amplifier (OPCPA) centered at a wavelength of 2.2 µm and generating 16.5 fs pulses (2.2 oscillation cycles of the carrier wave) with 25 W of average power and a peak power exceeding 14 GW at 100 kHz pulse repetition rate. This corresponds to the highest reported peak power for high-repetition-rate long-wavelength laser systems. The output of this 2.2 µm OPCPA system was used to generate a coherent SXR radiation extending beyond 0.6 keV through HHG in a high-pressure gas cell.
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