Measurement of saturation intensities in ion doped solids by transient nonlinear refraction
Measurement of saturation intensities in ion doped solids by transient nonlinear refraction
复制标题
通过瞬态非线性折射测量离子掺杂固体中的饱和强度
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
T. Catunda
中科院分区：
文献类型：
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作者：
V. Pilla;P. Impinnisi;T. Catunda
利用z扫描信号ΔT(t)的瞬态响应来研究离子掺杂固体的非线性。用Ar+激光对红宝石和翠绿宝石进行了n2测量。我们观察到非线性响应时间τ随激光强度减小，τ−1=τ0−1(1+I/Is)，其中τ0为激发态寿命，为跃迁饱和强度。因此，通过测量不同激光强度下的瞬态响应，我们不仅可以确定红宝石和两个亚历山大变石中Cr+3的非线性复折射率n2，还可以确定τ0和Is。
The transient response of the Z-scan signal ΔT(t) was used to investigate the nonlinearity of ion doped solids. n2 measurements in ruby and alexandrite were performed using an Ar+ laser. We observed that the nonlinearity response time τ decreases with the laser intensity as τ−1=τ0−1(1+I/Is), where τ0 is the excited state lifetime and Is the transition saturation intensity. So, by measuring the transient response at different laser intensities, we were able to determine not only the nonlinear complex refractive index n2 but also τ0 and Is for Cr+3 in ruby and in the two alexandrite sites.