title: Spectral phase retrieval from interferometric autocorrelation by a combination of graduated optimization and genetic algorithms.
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.
authors.affiliation: Institute for Quantum Studies and Department of Physics & Astronomy, Texas A&M University, College Station, TX 77843-4242, USA. ywlonion@physics.tamu.edu
authors.forename: Wenlong
authors.initials: W
authors.lastname: Yang
authors.forename: Matthew
authors.initials: M
authors.lastname: Springer
authors.forename: James
authors.initials: J
authors.lastname: Strohaber
authors.forename: Alexandre
authors.initials: A
authors.lastname: Kolomenski
authors.forename: Hans
authors.initials: H
authors.lastname: Schuessler
authors.forename: George
authors.initials: G
authors.lastname: Kattawar
authors.forename: Alexei
authors.initials: A
authors.lastname: Sokolov