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Saturable and dispersive parity-time symmetric directional coupler: a transmission-line modelling study

Phang, Sendy; Vukovic, Ana; Benson, Trevor M.; Creagh, Stephen; Sewell, Phillip; Gradoni, Gabriele

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Authors

ANA VUKOVIC ANA.VUKOVIC@NOTTINGHAM.AC.UK
Professor of Electromagnetic Applications

Trevor M. Benson

PHIL SEWELL phillip.sewell@nottingham.ac.uk
Professor of Electromagnetics

Gabriele Gradoni



Abstract

In this paper, numerical modelling of Parity-Time (PT) coupled waveguides is reported. The PT coupled waveguide structure consists of two coupled slab waveguides based on GaAs material with gain/loss material parameter models, including both dispersion and saturation. The numerical model used analyses the impact of dispersion and saturation on the eigenmode extracted by a curve fitting approach. The results show that the presence of saturation may prohibit the appearance of the threshold point above which the PT system becomes unstable.

Conference Name Transparent Optical Networks (ICTON), 2014 16th International Conference on
End Date Jul 10, 2014
Publication Date Jan 1, 2014
Deposit Date Jul 21, 2015
Publicly Available Date Jul 21, 2015
Peer Reviewed Peer Reviewed
Public URL https://nottingham-repository.worktribe.com/output/999523
Publisher URL http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6876685
Additional Information Published in: 16th International Conference on Transparent Optical Networks, Graz, Austria, July 6-10, 2014. pp. 1-6 doi: 10.1109/ICTON.2014.6876685.

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