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Updated: Jun 10, 2026

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis
Published on: August 19, 2021
Spectral phase retrieval from interferometric autocorrelation by a combination of graduated optimization and genetic
Wenlong Yang1, Matthew Springer, James Strohaber
1Institute for Quantum Studies and Department of Physics & Astronomy, Texas A&M University, College Station, TX 77843-4242, USA. ywlonion@physics.tamu.edu
Abstract:
We describe a method for retrieving spectral phase information from second harmonic interferometric autocorrelation measurements supplemented by the use of the observed spectral intensity. By applying a combination of graduated optimization and genetic algorithms, accurate phase retrieval of laser pulses as short as a few optical cycles was obtained from the measured autocorrelation and spectral intensity. The effectiveness of the combined algorithms is demonstrated on a set of significantly different femtosecond pulse shapes.
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