Sheik-Bahae M, Wang J, Desalvo R, Hagan D J, Stryland E W
Opt Lett. 1992 Feb 15;17(4):258-60. doi: 10.1364/ol.17.000258.
A simple dual-wavelength (two-color) Z-scan geometry is demonstrated for measuring nonlinearities at frequency omega(p) owing to the presence of light at omega(e). This technique gives the nondegenerate two-photon absorption (2PA) coefficient beta(omega(p); omega(e)) and the nondegenerate nonlinear refractive index n(2)(omega(p); omega(e)), i.e., cross-phase modulation. We demonstrate this technique on CS(2) for n(2) and on ZnSe where 2PA and n(2) are present simultaneously.
展示了一种简单的双波长（双色）Z扫描几何结构，用于测量由于存在频率为ω(e)的光而在频率ω(p)处产生的非线性。该技术可得出非简并双光子吸收（2PA）系数β(ω(p); ω(e))和非简并非线性折射率n(2)(ω(p); ω(e))，即交叉相位调制。我们在CS(2)上对n(2)以及在同时存在2PA和n(2)的ZnSe上演示了该技术。
