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Direct measurement of spectral phase for ultrashort laser pulses
Vadim V Lozovoy1, Bingwei Xu, Yves Coello
1Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.
Abstract:
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.

