| Original Articles |
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High-Order Harmonic Generation by Two Non-collinear Coherent Femtosecond Laser Pulses |
| LU Wei-Xin;LIU Ting-Ting;YANG Hong;SUN Tao-Heng;GONG Qi-Huang |
| State Key Laboratory for Mesoscopic Physics and Department of
Physics, Peking University, Beijing 100871 |
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| Cite this article: |
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LU Wei-Xin, LIU Ting-Ting, YANG Hong et al 2003 Chin. Phys. Lett. 20 848-851 |
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Abstract We have studied the high-order harmonic generated by two coherent pulses in argon gas produced by a gas jet. A loop in the relationship of the harmonic intensity versus the absolute values of relative phase difference was observed for non-collinear arrangement. Compared with the collinear arrangement, increase of 10 times of the conversion efficiency for 17th-order harmonic generation at an appropriate relative phase difference was obtained. The calculation of the intensity and phase for the laser field near the focus gives a simple reason for these phenomena.
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| Keywords:
42.65.Ky
42.65.Re
33.80.Rv
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Published: 01 June 2003
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| PACS: |
42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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33.80.Rv
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(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))
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