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Opt Express. 2008 Jan 21;16(2):592-7.

Direct measurement of spectral phase for ultrashort laser pulses.

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  • 1Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.


We present an intuitive pulse characterization method that provides an accurate and direct measurement of the spectral phase of ultrashort laser pulses. The method requires the successive imposition of a set of quadratic spectral phase functions on the pulses while recording the corresponding nonlinear spectra. The second-derivative of the unknown spectral phase can be directly visualized and extracted from the experimental 2D contour plot, without any inversion algorithm or mathematical manipulation.

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