Abstract

Free-space propagation of ultrashort pulses is investigated. Space–time couplings are reduced for a particular form of beams that is termed a pulse beam, or a type 3 pulsed beam. General conditions for the formation of pulse beams in the paraxial approximation are presented. The free-space propagation of spatially localized ultrashort laser pulses is investigated. This treatment is based on a particular pulsed form of the well-known Bessel beam, which is termed a Bessel pulse beam. The connections with focus wave modes and X waves are discussed.

© 2001 Optical Society of America

Generalized Bessel pulse beams

Colin J. R. Sheppard
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