title: Spectral amplitude and phase measurement of ultrafast pulses using all-optical differential tomography.
abstract: We demonstrate a simple, all-optical, fiber-based method for characterizing the spectral amplitude and phase of ultrafast pulses using a differential tomographic measurement realized via four-wave mixing. The technique is applied to subpicosecond pulses in the C-band of the telecommunication spectrum. Characterization of amplified pulses and propagation through dispersive media is demonstrated and compared with autocorrelation measurements and calculated predictions. We show how our approach can be extended to larger bandwidths in similar systems, extending tomographic reconstruction of coherent fields to nearly an octave of bandwidth while maintaining a robust, waveguide-based geometry.
authors.affiliation: School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA. pl336@cornell.edu
authors.forename: Pablo
authors.initials: P
authors.lastname: Londero
authors.forename: Onur
authors.initials: O
authors.lastname: Kuzucu
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Gaeta