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A Novel Nonparaxial Time-Domain Beam-Propagation Method
For Modeling
Ultrashort Pulses In Optical Structures
Masoudi, HM
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, JOURNAL OF
LIGHTWAVE TECHNOLOGY; pp: 3175-3184; Vol: 25
King Fahd University of Petroleum & Minerals
http://www.kfupm.edu.sa
Summary
In this paper, a new nonparaxial time-domain beam-propagation method (TD-BPM)
based on Pade approximant for modeling ultrashort optical pulses has been proposed
and verified. The high efficiency of the technique in modeling long device interaction
comes from solving the TD wave equation along one direction and allowing the time
window to follow the evolution of the pulse. The accuracy of the method was tested in
three different environments of homogenous and nondispersive medium, metallic, and
dielectric waveguides and then was applied to model ultrashort pulse propagation in a
directional-coupler device. The characterization of the technique shows excellent
performance in terms of accuracy, efficiency, and stability, which the conventional
paraxial TD-BPM failed to achieve. The new TD-BPM is particularly well suited for
the study of unidirectional propagation of compact ultrashort temporal pulses over
long distances in waveguide structures.
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Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa
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Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa