title: Three-dimensional spatiotemporal pulse characterization with an acousto-optic pulse shaper and a Hartmann-Shack wavefront sensor.
abstract: We demonstrate a simplified arrangement for spatiotemporal ultrashort pulse characterization called Hartmann-Shack assisted, multidimensional, shaper-based technique for electric-field reconstruction. It employs an acousto-optic pulse shaper in combination with a second-order nonlinear crystal and a Hartmann-Shack wavefront sensor. The shaper is used as a tunable bandpass filter, and the wavefronts and intensities of quasimonochromatic spectral slices of the pulse are obtained using the Hartmann-Shack wavefront sensor. The wavefronts and intensities of the spectral slices are related to one another using shaper-assisted frequency-resolved optical gating measurements, performed at particular points in the beam. This enables a three-dimensional reconstruction of the amplitude and phase of the pulse. We present some example pulse measurements and discuss the operating parameters of the device.
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, Barcelona, Spain.
authors.forename: Seth L
authors.initials: SL
authors.lastname: Cousin
authors.forename: Juan M
authors.initials: JM
authors.lastname: Bueno
authors.forename: Nicolas
authors.initials: N
authors.lastname: Forget
authors.forename: Dane R
authors.initials: DR
authors.lastname: Austin
authors.forename: J
authors.initials: J
authors.lastname: Biegert