Journal
PHYSICAL REVIEW E
Volume 61, Issue 1, Pages 862-873Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevE.61.862
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We present a model of isodiffracting single-cycle and few-cycle ultrashort electromagnetic pulses. The model is based on exact solutions of the time-dependent paraxial wave equation with space-time coupling effects included. The spatiotemporal structure of these pulses is characterized by a scaling parameter which relates off-axis pulse shapes to the axial temporal waveforms. Depending on the spectrum a pulse may transform itself from a single-cycle pulse to a multicycle pulse along the radial coordinate. This model is also used to describe recirculating pulses in a curved mirror cavity resonator. The Gouy phase Shift contributes an absolute phase that results in a pulse-to-pulse temporal instability. PACS number(s): 42.25.Bs, 42.65.Re, 41.20.Jb, 42.60.Da.
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