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

被引：38

作者：

Phang, Sendy ^{[1
]}

Vukovic, Ana ^{[1
]}

Susanto, Hadi ^{[2
]}

Benson, Trevor M. ^{[1
]}

Sewell, Phillip ^{[1
]}

机构：

[1] Univ Nottingham, Fac Engn, George Green Inst Electromagnet Res, Nottingham NG7 2RD, England

[2] Univ Essex, Dept Math Sci, Colchester CO4 3SQ, Essex, England

来源：

OPTICS LETTERS | 2014年 / 39卷 / 09期

关键词：

SYMMETRY;

D O I：

10.1364/OL.39.002603

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2014 Optical Society of America

引用

页码：2603 / 2606

页数：4

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