title: Accuracy measurements and improvement for complete characterization of optical pulses from nonlinear processes via multiple spectral-shearing interferometry.
abstract: We demonstrate that multiple spectral-shearing interferometry increases the precision and accuracy of measurements of the spectral phase of a complex pulse (time-bandwidth product = 125) arising from self-phase modulation in a gas filled capillary. We verify that the measured interferometric phase is accurate to 0.1 rad across the full bandwidth by checking the consistency between the spectral phases of each individual shear measurement. The accuracy of extracting pulse parameters (group delay dispersion, pulse duration and peak intensity) for single shear measurements were verified to better than 10% by comparison with the multishear reconstruction. High order space-time coupling is quantified across a single transverse dimension, verifying the suitability of such pulses for use in strong field experiments.
authors.affiliation: Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, UK. a.wyatt1@physics.ox.ac.uk
authors.forename: Adam S
authors.initials: AS
authors.lastname: Wyatt
authors.forename: Alexander
authors.initials: A
authors.lastname: Grün
authors.forename: Philip K
authors.initials: PK
authors.lastname: Bates
authors.forename: Olivier
authors.initials: O
authors.lastname: Chalus
authors.forename: Jens
authors.initials: J
authors.lastname: Biegert
authors.forename: Ian A
authors.initials: IA
authors.lastname: Walmsley
mesh_terms: D003198:Computer Simulation; D007368:Interferometry / Q000379:methods; D008027:Light; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D012542:Scattering, Radiation; D013057:Spectrum Analysis / Q000379:methods*