| 18709063 |
Gu B, Ji W, Huang XQ: Analytical expression for femtosecond-pulsed Z scans on instantaneous nonlinearity. Appl Opt. 2008 Mar 20;47(9):1187-92.
By employing the Gaussian decomposition method, the analytical formulas of the Gaussian-beam Z-scan traces have been derived for an optically thin material exhibiting both refractive and absorptive parts of third-order nonlinearity, with Gaussian or hyperbolic secant squared laser pulses of femtosecond duration. The formulas have been verified experimentally with femtosecond-pulsed Z scans on a carbon disulfide and acetone solution of a chalcone derivative (0.95C (18) H (17) ClO (4) . 0.05C (17) H (14) Cl (2) O (3)). An efficient yet accurate analytical technique has been demonstrated for extracting both the nonlinear refraction coefficient and the nonlinear absorption coefficient from a single closed-aperture Z-scan trace. |
81(1,1,1,1) |