Mid-infrared modulated polarization gating for ultra-broadband supercontinuum generation.
Mid-infrared modulated polarization gating for ultra-broadband supercontinuum generation.
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DOI：
10.1364/oe.18.011308
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发表时间：
2010-05
期刊：
影响因子：
3.8
通讯作者：
W. Hong;Pengfei Wei;Qingbin Zhang;Shaoyi Wang;P. Lu
中科院分区：
文献类型：
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作者：
W. Hong;Pengfei Wei;Qingbin Zhang;Shaoyi Wang;P. Lu
为了有效地在中性稀有气体介质中产生超宽带超连续谱，我们提出了一种通过中红外调制偏振门来控制谐波过程的方法。利用较弱的800 nm线偏振脉冲调制的中红外偏振选通脉冲，同时控制谐波过程中的电离、加速和复合步骤，在低电离率下有效地产生了覆盖从紫外光到水窗x射线的超宽带超连续谱。利用合适的位相匹配技术宏观地选择超连续谱的短量子路径，直接获得波长可调的孤立亚100As脉冲。这种超连续谱还支持远低于一个原子时间单位的脉冲持续时间。
We propose a method to control the harmonic process by a mid-IR modulated polarization gating for the effective generation of an ultra-broadband supercontinuum in the neutral rare-gas media. Using a mid-IR polarization gating pulse modulated by a weaker 800-nm linearly polarized pulse, the ionization, acceleration and recombination steps in the harmonic process are simultaneously controlled, leading to the efficient generation of an ultra-broadband supercontinuum covered by the spectral range from ultraviolet to water window x ray under the low ionization rate. The right phase-matching technique is employed to macroscopically select the short quantum path of the supercontinuum, then isolated sub-100-as pulses with tunable wavelengths are directly obtained. This supercontinuum also supports the pulse duration far below one atomic unit of time.