| The Carrier-Envelope Phase of Focused Few-Cycle Laser Pulses |
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| 作者姓名： | 周永恒 蒋红兵 龚旗煌 |
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| 作者单位： | Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871 |
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| 基金项目： | Supported by the National Key Basic Research Special Foundation under Grant No TG1999075207, the National Natural Science Foundation of China under Grant Nos 10104003 and 90101027. |
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| 摘 要： | The Gouy phase shift modulates the carrier-envelope phase of a focused few-cycle laser pulse. We investigate the variations of the carrier-envelope （CE） phase of a pulsed Gaussian beam on and off the axis by the first-order approximation and numerical calculation. The CE phase undergoes a π shift from minus infinity to infinity, and it changes fastest with distance at the focus. The variation of CE phase on propagation distance is nearly independent of pulse duration At when At is greater than lO fs and the first order approximation fits this result very well. The maximum difference of CE phase between a pulse with duration of one cycle and the result of first-order approximation is 0.09.
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| 关 键 词： | 激光脉冲 相调制 包络载体相 脉冲高斯光束 数字计算 |
| 收稿时间： | 2005-08-30 |
| 修稿时间： | 2005-08-30 |
The Carrier-Envelope Phase of Focused Few-Cycle Laser Pulses |
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| ZHOU Yong-Heng, JIANG Hong-Bing, GONG Qi-Huang.The Carrier-Envelope Phase of Focused Few-Cycle Laser Pulses[J].Chinese Physics Letters,2006,23(1):110-112. |
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| Authors: | ZHOU Yong-Heng JIANG Hong-Bing GONG Qi-Huang |
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