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Numerical investigation of the effects of smoothing by spectral dispersion on stimulated rotational Raman scattering

机译:频谱色散平滑对受激旋转拉曼散射影响的数值研究

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The effect of smoothing by spectral dispersion (SSD) on stimulated rotational Raman scattering (SRRS) in air has been investigated both numerically and theoretically. The suppression effect of SSD on SRRS process is verified and it is demonstrated and proposed that the suppression effect is attributed to two aspects: the decreasing of the laser fluence modulation degree and the reducing of Stokes gain coefficient caused by the temporal and spatial variation of the phase of the incident laser pulse. The simulation results show that the SRRS threshold distance can be lengthened by choosing appropriate SSD parameters.
机译:数值和理论上都研究了通过频谱弥散(SSD)平滑对空气中受激旋转拉曼散射(SRRS)的影响。验证了SSD对SRRS工艺的抑制作用,并提出抑制效果可以归结为两个方面:激光能量密度调制程度的降低和激光能量密度的时空变化引起的斯托克斯增益系数的降低。入射激光脉冲的相位。仿真结果表明,通过选择合适的SSD参数可以延长SRRS阈值距离。

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