论文标题
高功率几个周期的近红外OPCPA，用于100 kHz的软X射线生成
High-power few-cycle near-infrared OPCPA for soft X-ray generation at 100 kHz
论文作者
论文摘要
我们提出了一个近红外的光学参数式脉冲放大器（OPCPA）和软X射线（SXR）高谐波生成系统。 OPCPA在800 nm的中心波长下产生少量循环脉冲，并以100 kHz的高重复速率运行。它是由完全可编程的振幅和相位控制的超宽带脉冲从Ti：Sapphire振荡器播种的。将OPCPA系统的输出压缩到接近转换有限的9.3-FS脉冲。高功率运行达到了平均功率35 W，并记录了22.5 W功率水平的完全表征的脉冲压缩，表明峰值功率大于21 gW。我们证明，在如此高的重复速率下，可以通过级联的第二谐波生成方法来实现时空扁平的泵脉冲，效率超过70％，为近乎汇率的功率尺度尺度超出的Ultra Boodbard Systems提供了引人注目的OPCPA架构。该800 nm OPCPA系统的输出用于通过氦气中的高谐波产生产生SXR辐射，达到190 eV光子能量。
We present a near-infrared optical parametric chirped-pulse amplifier (OPCPA) and soft X-ray (SXR) high-harmonic generation system. The OPCPA produces few-cycle pulses at a center wavelength of 800 nm and operates at a high repetition rate of 100 kHz. It is seeded by fully programmable amplitude and phase controlled ultra-broadband pulses from a Ti:sapphire oscillator. The output from the OPCPA system was compressed to near-transform-limited 9.3-fs pulses. High-power operation up to an average power of 35 W was achieved, and a fully characterized pulse compression was recorded for a power level of 22.5 W, demonstrating pulses with a peak power greater than 21 GW. We demonstrate that at such high repetition rates, spatiotemporally flattened pump pulses can be achieved through a cascaded second-harmonic generation approach with an efficiency of more than 70%, providing a compelling OPCPA architecture for power-scaling ultra-broadband systems in the near-infrared. The output of this 800-nm OPCPA system was used to generate SXR radiation reaching 190 eV photon energy through high-harmonic generation in helium.
