Generation of sub-two-cycle mid-infrared pulses by four-wave mixing through filamentation in air
Generation of sub-two-cycle mid-infrared pulses by four-wave mixing through filamentation in air
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DOI：
10.1364/ol.32.003330
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发表时间：
2007-11-15
期刊：
影响因子：
3.6
通讯作者：
Suzuki, Toshinori
中科院分区：
文献类型：
--
作者：
Fuji, Takao;Suzuki, Toshinori
产生子两个周期，微焦耳脉冲在中红外区域的演示。将25 fs钛宝石放大器输出的基波和二次谐波脉冲聚焦到空气中，通过四波差频产生，产生极宽带中红外脉冲。的光谱带宽的半最大值的全宽度达到一个倍频程（2.5 - 5.5 μ m），这是足够宽的子单周期脉冲产生。在没有任何压缩器的情况下，通过互相关频率分辨光学选通估计脉冲宽度为13 fs。超过几微焦耳的输出能量对于光谱学是足够的。(c)2007年，美国光学学会。
Generation of sub-two-cycle, microjoule pulses in the mid-infrared region is demonstrated. Fundamental and second-harmonic pulses of 25 fs Ti:sapphire amplifier output were focused into the air to produce extremely broadband mid-infrared pulses by four-wave difference-frequency generation through the filamentation. The full width at half-maximum of the spectral bandwidth reaches one octave (2.5 - 5.5 mu m), which is sufficiently broad for sub-single-cycle pulse generation. The pulse width was estimated to be 13 fs, without any compressors, by cross-correlation frequency resolved optical gating. The output energy of more than a few microjoule is sufficient for spectroscopy. (c) 2007 Optical Society of America.