title: Time-domain interferometry for direct electric field reconstruction of mid-infrared femtosecond pulses.
abstract: Mid-infrared ultrashort pulses of 9.2-microm center wavelength are characterized in both amplitude and phase. This is achieved by use of a variant of spectral phase interferometry for direct electric field reconstruction in which spectral interferometry has been replaced with time-domain interferometry, a technique that is well suited for infrared pulses. The setup permits simultaneous recording of the second-order interferometric autocorrelation, thus providing an independent check on the retrieved spectral phase.
mesh_terms: D004560:Electricity; D007259:Infrared Rays; D007368:Interferometry / Q000379:methods; D008962:Models, Theoretical; D013997:Time Factors