非线性折射率与泵浦平均功率的平方成正比。
Nonlinear refraction index change is proportional to square of mean pump power.
实验结果表明，该样品的非线性折射率为负值。
The experimental results show that the nonlinear refractive index of the sample is a negative value.
研究增益介质中高能态粒子受激跃迁引起的非线性折射率。
The nonlinear index of refraction induced by stimulated transition of high level populations in the gain medium is investigated.
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