荧光强度与激发光强度的三次方关系表明，有效的荧光产生起源于三阶非线性光学效应的增强。
The intensity dependence of integrated luminescence on pump power shows that this is a third-order nonlinear optical effect.
随着光激发强度的增加，紫光发射强度超线性增强，且稍有蓝移，而紫外光发光强度则近似线性增加。
With an increase in intensity of the excitation light, the violet emission peak increases super linearly and the UV emission increases linearly.
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