title: Comment on: Novel method for ultrashort laser pulse-width measurement based on the selfdiffraction effect.
abstract: A new technique for the measurement of the pulse-width of ultrashort optical pulses has been recently proposed [1]. I argue in this comment that such a technique is unable to get any temporal information on an ultrashort pulse, based on the absence of a time-non-stationary element in the proposed setup.
authors.forename: Christophe
authors.initials: C
authors.lastname: Dorrer