Three-level picture for chirp-dependent fluorescence yields under femtosecond optical pulse irradiation

Hashimoto, Naoyuki T.; Misawa, Kazuhiko; Lang, Roy
April 2003
Applied Physics Letters;4/28/2003, Vol. 82 Issue 17, p2749
Academic Journal
We propose a simple model to account for chirp-dependent fluorescence yields from a substance under femtosecond optical pulse irradiation. The model is simple, consisting of a three-level system, and yet it explains the essential feature of the chirp-dependent fluorescence yields experimentally observed, for example, with cyanine dye molecules. Based on the model, the dependence of the fluorescence on the excitation pulse properties such as the chirp rate and pulse intensity has been examined in detail. The results indicate that chirp-dependent fluorescence can be utilized as a convenient means for characterizing phase distortions in optical pulses such as those in optical fiber communication systems.


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