Nonlinear beat noise in optical parametric chirped-pulse amplification.
Nonlinear beat noise in optical parametric chirped-pulse amplification.
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DOI：
10.1364/oe.25.029769
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发表时间：
2017-11
期刊：
影响因子：
3.8
通讯作者：
Jing Wang;Jingui Ma;P. Yuan;Daolong Tang;Bingjie Zhou;G. Xie;L. Qian
中科院分区：
文献类型：
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作者：
Jing Wang;Jingui Ma;P. Yuan;Daolong Tang;Bingjie Zhou;G. Xie;L. Qian
目前最先进的PB级激光器的脉冲对比度受到相干噪声的限制。本文报道了在光参量啁啾脉冲放大(OPCPA)中，由两种相干噪声的非线性混合产生的一类新的噪声，称为非线性拍频噪声。从理论上研究了OPCPA放大器中的各种非线性拍频噪声，揭示了它们的强度演化过程。结果表明，非线性拍频噪声将对未来的百拍瓦激光器产生破坏性影响。
The pulse contrast of state-of-the-art petawatt lasers is limited by coherent noise. This paper reports on a new family of noise, termed nonlinear beat noise, which is generated by the nonlinear mixing of two kinds of coherent noise in optical parametric chirped-pulse amplification (OPCPA). We theoretically study the various nonlinear beat noises and reveal their intensity evolutions in an OPCPA amplifier. The results suggest that nonlinear beat noise will be destructive to the future hundred-petawatt lasers.