Volume 11, Issue 1 (International Journal of Optics and Photonics (IJOP) Vol 11, No 1, Winter-Spring 2017 2017)                   IJOP 2017, 11(1): 49-56 | Back to browse issues page


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Yousefi E, Hatami M, Dehghani S. Optimization of Bistability in Nonlinear Chalcogenide Fiber Bragg Grating for All Optical Switch and Memory Applications. IJOP. 2017; 11 (1) :49-56
URL: http://ijop.ir/article-1-275-en.html
1- Yazd University
2- Shiraz University of Technology
3- Shiraz University
Abstract:   (3782 Views)

We solve the coupled mode equations governing the chalcogenide nonlinear fiber Bragg gratings (FBGs) numerically, and obtain the bistability characteristics. The characteristics of the chalcogenide nonlinear FBGs such as: switching threshold intensity, bistability interval and on-off switching ratio are studied. The effects of FBG length and its third order nonlinear refractive index on FBG characteristics are investigated. We obtain an interesting result that independent of the third order nonlinear refractive index; there exists an optimum FBG length of about 6 mm at which the on-off switching ratio becomes maximized. It is also found that by increasing the nonlinearity, the maximum value of on-off switching ratio decreases. The results of this paper can be mainly used for designing all-optical switches and memories.

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Type of Study: Research | Subject: Special
Received: 2016/06/20 | Revised: 2016/07/27 | Accepted: 2016/08/20 | Published: 2017/01/28

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