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Journal of Physics B Atomic Molecular and Optical Physics

Modulation of supercontinuum generation and formation of an attosecond pulse from a generalized two-level medium

Ke Zhao, Ji‐Cai Liu, Chuan‐Kui Wang, Yi Luo

Published Mar 26, 2007• 2 citations
Publisher

Abstract

The propagation of ultrashort pulses in a generalized two- level system, consisting of permanent dipole moments, is simulated by solving the full Maxwell - Bloch equations. Special attention has be ...
DOI
10.1088/0953-4075/40/8/006

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Recent progress in ultrafast technology has led to the generation of optical pulses as short as 8 fs. The propagation of such short pulses in nonlinear optical media requires new computational techniques in which the standard approximations such as the slowly-varying envelope approximation (SVEA) and rotating-wave approximation (RWA) are not made while using the Maxwell-Bloch equations [1]. Previous calculations, which used the finite-difference time-domain (FDTD) method, found that for a a Kerr-like instantaneous nonlinearity [2] significant differences can occur when the full vector Maxwell equations are used instead of the nonlinear Schrodinger equation. Recently, the FDTD method has been extended to the case of a homogeneously broadened two-level atomic system [3].