Implementation of Optical Reversible Multiplexer Using Mach-Zehnder Interferometer

Abstract

With the advancements in semiconductor technology, there has been an increased emphasis in low-power design techniques over the last few decades. Now-a-days, semiconductor optical amplifier (SOA)- based Mach–Zehnder interferometer (MZI) plays a vital role in the field of ultra-fast all-optical signal processing. Reversible computing has been proposed by several researchers as a possible alternative to address the energy dissipation problem. Several implementation alternatives for reversible logic circuits have also been explored in recent years, like adiabatic logic, nuclear magnetic resonance, optical computing, etc. Recently researchers have proposed implementations of vari­ous reversible logic circuits in the all-optical computing domain. Most of these works are based on semicon­ductor optical amplifier (SOA) based Mach-Zehnder in­terferometer (MZI), which provides desirable features like low power, fast switching and ease of fabrication.

In this paper we present an all-optical implementa­tion of a digital multiplexer using MZI switches.we ex­ploring this project with MZI based Carry lookahead Adder(CLA). Both non-reversible and reversible ver­sions of multiplexer design are proposed, along with analytical evaluation of the design complexities both in terms of delay and resource requirements. The final optical netlists obtained have been compared against traditional reversible synthesis approaches, by using an available synthesis tool and then mapping the revers­ible gates to MZI switch based implementations. Some techniques for optimizing the final optical netlists have also been proposed.