We in this post we want to examine structues that offer for Threshold Function in optic communication.Threshold Function is a mechanism that suppress signal optic thas is lower a from Low -Level and amplify signal that is higher a High-Level.
On of a structure for threshold function is used HNLF, it is used in the article.
Fig1:circut diagram optical threshold diagram,VOA varible optical attenuator
In this paper, they considered values between 0.75 and 1 as the logic “high” state and values between 0 and 0.25 as the logic “low” state. However, it is possible to reduce the variation of the high output levels and suppress the low logic levels shown in Fig. 5 using optical thresholding schemes. The thresholder function can also improve the extinction ratio (ER) values of different logic gates.
An other paper it describe threshold function in transfer function.
Fig2:Power Transmistion Function
So we need Threshold Function Based for all optical logic gate, for imporoving them.
C. C. A. Reis, T. Chattopadhyay, P. André, and A. Teixeira, “Single Mach–Zehnder interferometer based optical Boolean logic gates,” Applied Optics, vol. 51, no. 36, p. 8693, 2012.
H. Zhu, R. Wang, T. Pu, T. Fang, P. Xiang, J. Zheng, and H. Zhu, “Experimental demonstration of all-optical tunable thresholder for self-switching and thresholding,” 2015 4th International Conference on Computer Science and Network Technology (ICCSNT), 2015.