| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9577429 | Chemical Physics Letters | 2005 | 5 Pages |
Abstract
An optimal feedback control of two-photon fluorescence in the Coumarin 515 ethanol solution excited by shaping femtosecond laser pulses based on genetic algorithm is demonstrated experimentally. The two-photon fluorescence intensity can be enhanced by â¼20%. Second harmonic generation frequency-resolved optical gating traces indicate that the optimal laser pulses are positive chirp, which are in favor of the effective population transfer of two-photon transitions. The dependence of the two-photon fluorescence signal on the laser pulse chirp is investigated to validate the theoretical model for the effective population transfer of two-photon transitions. The experimental results appear the potential applications in nonlinear spectroscopy and molecular physics.
Related Topics
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Physical and Theoretical Chemistry
Authors
Shian Zhang, Zhenrong Sun, Xiangyun Zhang, Yu Xu, Zugeng Wang, Zhizhan Xu, Ruxin Li,