Abstract
In this paper, a new nonparaxial time-domain beam-propagation method (TD-BPM) based on Padé 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.
| Original language | English |
|---|---|
| Article number | 4346625 |
| Pages (from-to) | 3175-3184 |
| Number of pages | 10 |
| Journal | Journal of Lightwave Technology |
| Volume | 25 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 2007 |
Bibliographical note
Funding Information:Manuscript received March 29, 2007; revised June 24, 2007. This work was supported by King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia, and in part by King Abdul-Aziz City for Science and Technology (KACST), Riyadh, Saudi Arabia.
Keywords
- Beam propagation method (BPM)
- Finite-difference (FD) analysis
- Modeling
- Numerical analysis
- Optical waveguide theory
- Padé approximant
- Partial differential equation
- Ultrashort pulse propagation
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics