High—Order Harmonic Generation by Two Non—collinear Coherent Femtosecond |
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作者姓名: | LUWei-Xin LIUTing-Ting YANGHong SUNTao-Heng GONGQi-Huang |
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作者单位: | StateKeyLaboratoryforMesoscopicPhysicsandDepartmentofPhysics,PekingUniversity,University,Beijing100871 |
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摘 要: | 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 calulation of the intensity and phase for the laser field near the focus gives a simple reason for these phenomena.
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关 键 词: | 高次谐波产生 激光脉冲 HHG 非线性 飞秒脉冲 一致性 相差 |
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