All-optical carry lookahead adder with the help of terahertz optical asymmetric demultiplexer |
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| Authors: | Dilip Kumar Gayen Jitendra Nath Roy Rajat Kumar Pal |
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| Affiliation: | 1. Department of Computer Science, College of Engineering & Management, Kolaghat, KTPP Township, Midnapur (East) 721 171, W.B., India;2. Department of Physics, NIT, Agartala, Tripura, India;3. Department of Computer Science & Engineering, Calcutta University, Kolkata 700 009, India |
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| Abstract: | An all-optical model of carry lookahead adder (CLA) implemented with a semiconductor optical amplifier (SOA)-assisted Sagnac interferometer (TOAD) is presented. The model accounts for the SOA small signal gain, linewidth enhancement factor, the switching pulses energy and width and the Sagnac loop asymmetry. Adder is a very basic component in a central processing unit. The CLA is the highest speed adder nowadays. Theoritical model is presented and verified through numerical simulation. The method promises both higher processing speed and accuracy. The model can be enhanced the functionality in which carry lookahead adder is the basic building block. |
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