Abstract
In this work, the time-domain beam propagation method (TD-BPM) has been extended to model ultra-short
optical pulse propagation in structures containing material dispersion. The method uses Pade approximant to solve the
one-way non-paraxial wave equation. The TD-BPM is implemented and analyzed using several iterative numerical
techniques to model the propagation of ultra-short pulses in optical waveguide structures containing Lorentz material
dispersion. Systematic accuracy and efficiency assessment, compared to the FDTD, showed that the longitudinal and the
temporal steps sizes can be a number of order of magnitude larger than the FDTD step sizes. It is concluded that the
TD-BPM is suited for long dispersive dielectric structures interaction of short and ultra-short pulse propagation.
© 2014 IEEE
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