Spatiotemporal evolution and multiple self-focusing of ultrashort pulses in a resonant two-level medium

Yueping Niu*, Keyu Xia, Ni Cui, Shangqing Gong, Ruxin Li

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The spatiotemporal evolutions of ultrashort pulses in two dimensions are investigated numerically by solving the coupled Maxwell-Bloch equations without invoking the slowly varying envelope approximation and rotating-wave approximation. For an on-axis 2nπ sech pulse, local delay makes the temporal split 2π sech pulses crescent-shaped in the transverse distribution. Due to the transverse effect, the temporal split 2π sech pulses become unstable and experience reshaping during the propagation process. Then, interference occurs between the successive crescent-shaped pulses and multiple self-focusing can form.

Original languageEnglish
Article number063835
Pages (from-to)1-5
Number of pages5
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume78
Issue number6
DOIs
Publication statusPublished - 30 Dec 2008

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