Femtosecond pulse duration measurement by two-photon fluorescence detection |
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| Authors: | Lammel O Penzkofer A |
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| Institution: | (1) Institut II – Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany |
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| Abstract: | The two-photon absorption induced fluorescence in a methanolic rhodamine 6G solution is used to measure the pulse duration of a cw femtosecond Kerr–lens mode-locked Ti:sapphire laser by a Michelson-interferometer-type autocorrelator arrangement. Interference-free autocorrelation traces are obtained by correlating perpendicular polarized pulses. The two-photon polarization parameter of rhodamine 6G is determined by contrast ratio measurement. The time resolution limits are discussed. |
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| Keywords: | autocorrelator femtosecond pulses pulse duration measurement rhodamine 6G Ti:sapphire laser two-photon absorption two-photon fluorescence |
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