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利用光与物质相互作用的半经典理论建立了啁啾脉冲激光放大的输运方程,数值分析了多程放大过程中自相位调制对啁啾脉冲时域特性和频域特性的影响研究结果表明,由于自相位调制引起附加频率啁啾产生,啁啾脉冲瞬时频率发生变化,放大特性受到影响.通过对增益饱和状态下自相位调制效应的研究,提出利用入射脉冲的线性频率啁啾抑制自相位调制的影响.
The transport equation of chirped pulse laser amplification was established by using the semi-classical theory of the interaction between light and matter. The numerical analysis of the effect of self-phase modulation on the time domain and frequency domain characteristics of chirped pulse was carried out. Due to the additional frequency chirp caused by self-phase modulation, the chirp pulse instantaneous frequency changes, the amplification characteristics are affected.By studying the self-phase modulation effect under the condition of gain saturation, it is proposed that the linear frequency chirp suppression of the self-phase modulation Impact.