title: Multiframe observation of an intense femtosecond optical pulse propagating in air.
abstract: We have demonstrated femtosecond time-resolved and picosecond time-interval successive observations of a single femtosecond optical pulse propagating in air with ultrafast self-modulation such as filamentation. A quadruple femtosecond probe pulse crossing an intense propagating pulse at picosecond intervals was able to capture directly four successive images of the propagating pulse as in a movie but with femtosecond time resolution. From this observation, we can directly analyze and recognize the propagation process, which is significantly affected by pulse-energy fluctuation, and (or) atmospheric turbulence from shot to shot.
authors.forename: M
authors.initials: M
authors.lastname: Fujimoto
authors.forename: S
authors.initials: S
authors.lastname: Aoshima
authors.forename: Y
authors.initials: Y
authors.lastname: Tsuchiya