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

Phang, Sendy and Vukovic, Ana and Susanto, Hadi and Benson, Trevor M. and Sewell, Phillip (2014) Impact of dispersive and saturable gain/loss on bistability of nonlinear parity-time Bragg gratings. Optics Letters, 39 (9). pp. 2603-2606. ISSN 0146-9592

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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.

Item Type: Article
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: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Keywords: Optical amplifiers; Nonlinear optics; Bistability
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
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Depositing User: Phang, Sendy
Date Deposited: 21 Jul 2015 09:28
Last Modified: 02 Jul 2018 08:36

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