title: Spectral modulation of two coherently separated femtosecond laser pulses: comment.
abstract: In this comment the modulation is explained by the pulse lengthening that is caused by the path-length difference that accompanies the grating spectrometer. It is proposed that such a path-length difference is a direct function of the resolution of any type of spectrometer or monochromator.
authors.forename: N H
authors.initials: NH
authors.lastname: Abramson