title: Negative dispersion using pairs of prisms.
abstract: We show that pairs of prisms can have negative group-velocity dispersion in the absence of any negative material dispersion. A prism arrangement is described that limits losses to Brewster-surface reflections, avoids transverse displacement of the temporally dispersed rays, permits continuous adjustment of the dispersion through zero, and yields a transmitted beam collinear with the incident beam.
authors.forename: R L
authors.initials: RL
authors.lastname: Fork
authors.forename: O E
authors.initials: OE
authors.lastname: Martinez
authors.forename: J P
authors.initials: JP
authors.lastname: Gordon