用光学透射测量方法得到了该薄膜材料的基本光学常数（带隙、线性折射率、线性吸收系数）。
The band gap, linear refractive indices and absorption coefficients fundamental optical constants of the film were obtained through optical transmittance measurements.
介绍了Z -扫描技术的基本原理，以及Z -扫描技术在测量非线性光学介质的非线性折射率、非线性吸收系数等方面的应用。
The mechanism of Z - scan technique is introduced. It 's application to measuring nonlinear refractive index and nonlinear absorption coefficient for nonlinear optical medium is made.
通过数值拟合获得了磷化镓在飞秒激光脉冲作用下的非线性折射率和双光子吸收系数。
Nonlinear refractivity and two-photon absorption of GaP are obtained by numerical fitting the experimental results.
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