Zahedpour S, Wahlstrand J K, Milchberg H M
Opt Lett. 2015 Dec 15;40(24):5794-7. doi: 10.1364/OL.40.005794.
We measure the nonlinear refractive index coefficients in N₂, O₂, and Ar from visible through mid-infrared wavelengths (λ=0.4-2.4 μm). The wavelengths investigated correspond to transparency windows in the atmosphere. Good agreement is found with theoretical models of χ((3)). Our results are essential for accurately simulating the propagation of ultrashort mid-infrared pulses in the atmosphere.
我们测量了从可见光到中红外波长（λ = 0.4 - 2.4μm）范围内氮气、氧气和氩气中的非线性折射率系数。所研究的波长对应于大气中的透明窗口。结果与三阶非线性极化率χ((3))的理论模型吻合良好。我们的结果对于精确模拟超短中红外脉冲在大气中的传播至关重要。
