Impact of dispersive and saturable gain/loss on bistability of nonlinear parity–time Bragg gratings

Phang, Sendy; Vukovic, Ana; Susanto, Hadi; Benson, Trevor M.; Sewell, Phillip

Abstract

We report on the impact of realistic gain and loss models on the bistable operation of nonlinear parity–time (PT) Bragg gratings. In our model we include both dispersive and saturable gain and show that levels of gain/loss saturation can have a significant impact on the bistable operation of a nonlinear PT Bragg grating based on GaAs material. The hysteresis of the nonlinear PT Bragg grating is analyzed for different levels of gain and loss and different saturation levels. We show that high saturation levels can improve the nonlinear operation by reducing the intensity at which the bistability occurs. However, when the saturation intensity is low, saturation inhibits the PT characteristics of the grating.

Citation

Phang, S., Vukovic, A., Susanto, H., Benson, T. M., & Sewell, P. (2014). Impact of dispersive and saturable gain/loss on bistability of nonlinear parity–time Bragg gratings. Optics Letters, 39(9), 2603-2606. https://doi.org/10.1364/ol.39.002603

• Journal Article Type: Article
• Acceptance Date: Mar 25, 2014
• Online Publication Date: Apr 21, 2014
• Publication Date: May 1, 2014
• Deposit Date: Jul 21, 2015
• Publicly Available Date: Jul 21, 2015
• Journal: Optics Letters
• Print ISSN: 0146-9592
• Electronic ISSN: 1539-4794
• Publisher: Optical Society of America
• Peer Reviewed: Peer Reviewed
• Volume: 39
• Issue: 9
• Pages: 2603-2606
• DOI: https://doi.org/10.1364/ol.39.002603
• Keywords: Optical amplifiers; Nonlinear optics; Bistability
• Public URL: https://nottingham-repository.worktribe.com/output/726774
• Publisher URL: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-39-9-2603
• Additional Information: This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-39-9-2603. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.