Ultra-broadband water window supercontinuum generation with high efficiency in a three-color laser field
Ultra-broadband water window supercontinuum generation with high efficiency in a three-color laser field
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在三色激光场中高效产生超宽带水窗超连续谱
DOI：
10.1364/oe.21.002683
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发表时间：
2013
期刊：
影响因子：
3.8
通讯作者：
Lu Peixiang
中科院分区：
文献类型：
--
作者：
He Lixin;Li Yang;Zhang Qingbin;Lu Peixiang
我们提出了一种通过使用由 1600 nm 驱动脉冲和两个弱（3200 nm 和 400 nm）控制脉冲合成的三色场来生成超宽带超连续谱的有效方法。结果表明，我们的方案中HHG过程中的加速和电离步骤是同时控制的，这不仅可以加宽带宽，而且可以提高生成频谱的谐波产量。因此，观察到光子能量范围为 205 eV 至 480 eV 的高效超连续谱。基于我们的 3D 传播模拟，我们表明超连续谱的短量子路径具有良好的相位匹配性，并且可以在合适的传播条件下进行选择。由此，由于量子路径干扰而产生的调制大大减少，并且由于在水窗光谱区域内直接获得具有可调谐中心波长的脉冲，因此强烈隔离了sub-100。
We propose an efficient method to generate an ultra-broadband.supercontinuum by using a three-color field synthesized by a 1600 nm.driving pulse and two weak (3200 nm and 400 nm) control pulses. The.results show that the acceleration and ionization steps in the HHG process.are simultaneously controlled in our scheme, which can not only broaden.the bandwidth but also enhance the harmonic yields of the generated.spectrum. Thus a high-efficiency supercontinuum with the photon energies.ranging from 205 eV to 480 eV is observed. Based on our 3D propagation.simulations, we show that the short quantum path of the supercontinuum.is well phase-matched and can be selected under suitable propagation.conditions. Thereby, the modulation due to quantum path interference is.largely reduced and intense isolated sub-100 as pulses with tunable central.wavelengths are directly obtained within water window spectral region.