title: Spatiotemporal amplitude and phase retrieval of Bessel-X pulses using a Hartmann-Shack sensor.
abstract: We propose a new experimental technique, which allows for a complete characterization of ultrashort optical pulses both in space and in time. Combining the well-known Frequency-Resolved-Optical-Gating technique for the retrieval of the temporal profile of the pulse with a measurement of the near-field made with an Hartmann-Shack sensor, we are able to retrieve the spatiotemporal amplitude and phase profile of a Bessel-X pulse. By following the pulse evolution along the propagation direction we highlight the superluminal propagation of the pulse peak.
authors.affiliation: CNISM and Department of Physics and Mathematics, University of Insubria, Como, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Bonaretti
authors.forename: D
authors.initials: D
authors.lastname: Faccio
authors.forename: M
authors.initials: M
authors.lastname: Clerici
authors.forename: J
authors.initials: J
authors.lastname: Biegert
authors.forename: P
authors.initials: P
authors.lastname: Di Trapani
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D014159:Transducers