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用“Ｚ－ｓｃａｎ”方法对沿［１００］与沿［００１］方向切割的钒酸钇晶体的非线性折射率进行了测量，发现其非线性折射率的大小基本相同，但符号相反
The nonlinear refractive indices of yttrium vanadate crystals along [001] and along the [001] direction were measured by a “Z-scan” method and found to have essentially the same magnitude of nonlinear refractive index but with the opposite sign