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Faraday effect on stimulated Raman scattering in the linear region

Z J Liu, B Li, J Xiang, L H Cao, C Y Zheng, L Hao2018年Plasma Physics and Controlled FusionIF 2.2出版社

The paper presents the effect of Faraday rotation on stimulated Raman scattering (SRS). When light propagates along the magnetic field upon plasma, Faraday rotation occurs. The rotation angle can be expressed as approximately, where θ is the rotation angle and s is distance, ne is the electron density, nc is the critical density and B is magnetic field in unit of Gauss. Both the incident light and Raman light have Faraday effects. The angle between the polarization directions of incident light and Raman light changes with position. The driven force of electron plasma wave also reduces, and then SRS scattering level is reduced. Faraday rotation effect can increase the laser intensity threshold of Raman scattering, even if the magnetic field strength is small. The circularly polarized light incident case is also compared with that of the linearly polarized light incident. The Raman scattering level of linearly polarized light is much smaller than that of circularly polarized light in the magnetized plasma. The difference between linearly and circularly polarized lights is also discussed.

日本語訳

本論文は、誘導ラマン散乱(SRS)に対するファラデー回転の影響について述べている。光が磁化プラズマ中を伝播する際、ファラデー回転が生じる。回転角は近似的に と表され、ここでθは回転角、sは距離、neは電子密度、ncは臨界密度、Bはガウス単位の磁場である。入射光とラマン光の両方にファラデー効果が生じる。入射光とラマン光の偏光方向の間の角度は、位置とともに変化する。電子プラズマ波の駆動力も減少し、その結果SRS散乱レベルが低下する。磁場強度が小さくても、ファラデー回転効果はラマン散乱のレーザー強度閾値を増加させることができる。円偏光入射の場合と直線偏光入射の場合も比較されている。磁化プラズマ中では、直線偏光のラマン散乱レベルは円偏光のそれよりもはるかに小さい。直線偏光と円偏光の違いについても議論されている。

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Raman scatteringStimulated Raman scattering
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