title: Single-shot implementation of dispersion-scan for the characterization of ultrashort laser pulses.
abstract: We demonstrate a single-shot ultrafast diagnostic, based on the dispersion-scan (d-scan) technique. In this implementation, rather than translating wedges to vary the dispersion as in scanning d-scan, the pulse to be measured experiences a spatially varying amount of dispersion in a prism. The resulting beam is then imaged into a second-harmonic generation crystal and an imaging spectrometer is used to measure the two-dimensional trace, which is analyzed using the d-scan retrieval algorithm. We compare the single-shot implementation with the scanning d-scan for the measurement of sub-3.5-fs pulses from a hollow core fiber pulse compressor. We show that the retrieval algorithm used to extract amplitude and phase of the pulse provides comparable results, proving the validity of the new single-shot implementation in the near single-cycle regime.
authors.forename: D
authors.initials: D
authors.lastname: Fabris
authors.forename: W
authors.initials: W
authors.lastname: Holgado
authors.forename: F
authors.initials: F
authors.lastname: Silva
authors.forename: T
authors.initials: T
authors.lastname: Witting
authors.forename: J W G
authors.initials: JW
authors.lastname: Tisch
authors.forename: H
authors.initials: H
authors.lastname: Crespo