| Frequency shift and pulse compression of an ultrashort pulse in a large-amplitude plasma wave |
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| 作者姓名： | Zhengming Sheng Zhizhan Xu Jinxiu Ma Wei Yu |
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| 作者单位： | Shanghai Institute of Optics and Fine Mechanics，Academia sinica，Shanghai 201800，China |
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| 摘 要： | By calculating the momenta of a coupled set of nonlinear equations of laserpulse-plasma wave interaction in the weak relativistic approximation,the conditions for fre-quency up-shift have been found.That the energy change of the pulse due to frequency shiftis compensated by the change of plasma wave energy results in photon number conservation.Some factors that affect the frequency up-shift are studied.It is also found that the laser pulsecan be compressed when it is located near the valley of plasma density perturbation and ifsome threshold value of the plasma wave field is exceeded.
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| 收稿时间： | 1992/2/18 |
Frequency shift and pulse compression of an ultrashort pulse in a large-amplitude plasma wave |
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| Zhengming Sheng,Zhizhan Xu,Jinxiu Ma,Wei Yu.Frequency shift and pulse compression of an ultrashort pulse in a large-amplitude plasma wave[J].中国激光(英文版),1992,1(4):313-319. |
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| Authors: | Zhengming Sheng Zhizhan Xu Jinxiu Ma Wei Yu |
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| Abstract: | By calculating the momenta of a coupled set of nonlinear equations of laser pulse-plasma wave interaction in the weak relativistic approximation, the conditions for frequency up-shift have been found. That the energy change of the pulse due to frequency shift is compensated by the change of plasma wave energy results in photon number conservation. Some factors that affect the frequency up-shift are studied. It is also found that the laser pulse can be compressed when it is located near the valley of plasma density perturbation and if some threshold value of the plasma wave field is exceeded. |
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| Keywords: | frequency shift pulse compression ultrashort laser pulse plasma wave |
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