Dilip Kumar Gayen,




Terahertz optical asymmetric demultiplexer,semiconductor optical amplifier,half adder,optical logic,


Today communication needs huge operational speed. This will be accomplished in case the conventional carrier of data, i.e. electron is supplanted by a photon for gadgets based on switching and logic. Gates are the basic building pieces of advanced frameworks. Different logic and arithmetic operations can be done using this gate. Optical logic and arithmetic operations are exceptionally much anticipated in high-speed communication frameworks. In this paper, we have presented parallel models to perform the addition of two binary digits based on terahertz optical asymmetric demultiplexer (TOAD)/semiconductor optical amplifier (SOA)-assisted Sagnac gates. Using only two TOAD-based switches we have designed a parallel half adder. This optical circuit increases the speed of calculation and is also capable of synthesizing light as an input to form the output.  The most advantage of this parallel circuit is that no synchronization is required for distinctive inputs. The circuit is hypothetically planned and confirmed by numerical simulations.


I. Bhattacharyya A, Gayen D. K and Chattopadhyay T, “Alternative All-optical Circuit of Binary to BCD Converter Using Terahertz Asymmetric Demultiplexer Based Interferometric Switch”, Proceedings of 1st International Conference on Computation and Communication Advancement, 2013.
II. Gayen D. K, Roy J. N, Taraphdar C, and Pal R. K, “All-optical reconfigurable logic operations with the help of terahertz optical asymmetric demultiplexer”, International Journal for Light and Electron Optics. vol. 122, pp: 711-718, 2011.
III. Gayen D. K, Chattopadhyay T, Das M. K, Roy J. N and Pal R. K, “All-optical binary to gray code and gray to binary code conversion scheme with the help of semiconductor optical amplifier -assisted sagnac switch”, IET Circuits, Devices & Systems. vol. 5, pp: 123-131, 2011.
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VI. Li P, Huang D, Zhang X and Zhu G, “Ultra-high speed all-optical half-adder based on four wave mixing in semiconductor optical amplifier” Optics Express. vo1.14, pp: 11839-47, 2006.
VII. Minh H. L., Ghassemlooy Z., and Ng W. P, “Characterization and performance analysis of a TOAD switch employing a dual control pulse scheme in high speed OTDM demultiplexer” IEEE Communications Letters. vol.12, pp: 316-318, 2008.
VIII. Mukhopadhyay S and Chakraborty B, “A method of developing optical half- and full-adders using optical phase encoding technique”, Proceedings of the Conference on Communications, Photonics and Exhibition (ACP). TuX6 1-2, 2009.
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