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Interaction of parametric instabilities from 3ω and 2ω lasers in large-scale inhomogeneous plasmas

Q.S. Feng, Z.J. Liu, L.H. Cao, C.Z. Xiao, L. Hao, C.Y. Zheng, C. Ning, X.T. He2020年被引用 13Nuclear FusionIF 3出版社

The mechanism of energy transfer from 3ω pump light to stimulated Brillouin scattering (SBS) generated by 2ω pump light is proposed. The backscattering light of stimulated Raman scattering (SRS) generated by 3ω pump light can work as a seed of the SBS of 2ω pump light, which results in the increase of the latter. Adding 2ω pump light into 3ω pump light will decrease the reflectivity of SBS generated from 3ω pump light. The total reflectivity will first decrease and then increase with an increase of the ratio of 2ω light intensity to the intensity of 2ω and 3ω lights , and will be controlled in a lower level when this ratio f is about 10%−20%. These results give a method to control the total reflectivity of SBS and SRS in inertial confinement fusion (ICF) by adding 2ω light into 3ω light.

日本語訳

3ωポンプ光から2ωポンプ光によって生成される誘導ブリルアン散乱(SBS)へのエネルギー移動のメカニズムを提案する。3ωポンプ光によって生成される誘導ラマン散乱(SRS)の後方散乱光は、2ωポンプ光のSBSのシードとして機能し、その結果、後者の増大をもたらす。3ω光に2ω光を添加すると、3ω光から生成されるSBSの反射率が低下する。全反射率は、2ω光の強度と2ω光および3ω光の強度の比が増加するにつれて、最初に減少し、その後増加し、この比fが約10%−20%のときに低いレベルに制御される。これらの結果は、3ω光に2ω光を添加することにより、慣性核融合(ICF)におけるSBSとSRSの全反射率を制御する方法を提供する。

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Parametric instabilities
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