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

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.

Citation

Phang, S., Vukovic, A., Benson, T. M., Creagh, S., Sewell, P., & Gradoni, G. Saturable and dispersive parity-time symmetric directional coupler: a transmission-line modelling study. Presented at Transparent Optical Networks (ICTON), 2014 16th International Conference on

• 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.; ; © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.