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光束运动特性对焦斑束匀滑效果的影响
Influence of beam moving characteristics on smoothing effect of focal spot
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摘要: 提出了光束运动的概念和物理模型，针对光谱色散匀滑技术方案，以正弦位相调制脉冲和线性啁啾脉冲为例，理论分析了啁啾宽带光束的横向“运动”特性及其对焦斑匀滑效果的影响，详细讨论了运动速度大小、运动周期以及运动方式等对焦斑束匀滑特性的影响，得到在相同带宽下线性啁啾脉冲的匀滑效果要优于正弦位相调制脉冲匀滑效果的结论．Abstract: The concept and physical model of "beam moving" are proposed. For the scheme of angular spectral dispersion, taking the sinusoidally phase-modulated pulse and the linearly chirped pulse for example, the properties of the transverse movement of chirped broadband beam are analyzed theoretically. The effects of the transverse moving speed, the moving cycle and the moving mode on the smoothing of focal spot are discussed in detail. The results show that the linearly chirped pulse could achieve better smoothing effect than the sinusoidally frequency-modulated pulse with the same bandwidth.
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