Raman amplification of laser pulses near the threshold for plasma wave breaking
- 作者: Balakin A.1,2, Levin D.2
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隶属关系:
- Institute of Applied Physics
- Lobachevsky State University of Nizhny Novgorod
- 期: 卷 43, 编号 6 (2017)
- 页面: 677-684
- 栏目: Nonlinear Phenomena
- URL: https://journals.rcsi.science/1063-780X/article/view/186106
- DOI: https://doi.org/10.1134/S1063780X17060034
- ID: 186106
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详细
Equations are derived for the amplitudes of counter-propagating laser pulses near the threshold for plasma wave breaking, which allow one to describe laser pulses with durations on the order of the plasma oscillation period. In the quasi-monochromatic approximation, they take the form of conventional threewave equations with an additional nonlinearity for the plasma wave. The amplitudes of the amplified laser pulses estimated using these equations agree with results obtained by solving the complete equations. It is shown that Raman amplification of a weak quasi-monochromatic signal (plasma noise) in rarified plasma is significantly suppressed. At the same time, according to numerical simulations, the amplification of laser pulses with durations on the order of the plasma oscillation period is suppressed insignificantly. This result opens new prospects in the application of Raman compression of laser pulses without additional frequency modulation.
作者简介
A. Balakin
Institute of Applied Physics; Lobachevsky State University of Nizhny Novgorod
编辑信件的主要联系方式.
Email: balakin@appl.sci-nnov.ru
俄罗斯联邦, Nizhny Novgorod, 603950; Nizhny Novgorod, 603950
D. Levin
Lobachevsky State University of Nizhny Novgorod
Email: balakin@appl.sci-nnov.ru
俄罗斯联邦, Nizhny Novgorod, 603950