Mach-Zehnder interferometer based design of all optical reversible binary adder
Mach-Zehnder interferometer based design of all optical reversible binary adder
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基于Mach-Zehnder干涉仪的全光学可逆二进制加法器设计
DOI：
10.1109/date.2012.6176564
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Nagarajan Ranganathan
中科院分区：
文献类型：
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作者：
Saurabh Kotiyal;H. Thapliyal;Nagarajan Ranganathan
近年来，可逆逻辑已经成为一个有前途的计算模型，应用于无耗散光计算，低功耗CMOS，量子计算等。在可逆电路中，存在输入和输出之间的一对一映射，从而不会丢失信息。研究人员已经在光计算领域实现了可逆逻辑门，因为它可以提供高速度和低能量要求沿着易于在芯片级制造[1]。基于马赫-曾德尔干涉仪（Mach-Zehnder interferometer，MZI）的半导体光放大器（semiconductor optical amplifier，SOA）具有速度快、功耗低、开关时间短、易于制作等优点，是实现可逆门的全光实现技术。在这项工作中，我们提出了全光学实现的n位可逆涟漪进位加法器的第一次在文献中。全光可逆加法器的设计是基于两个新的光学可逆门，称为光学可逆门I（ORG-I）和光学可逆门II（ORG-II）和现有的全光费曼门。提出了两个新的可逆门ORG-I和ORGI-I，因为它们可以实现具有降低的光学成本的可逆加法器，光学成本是MZI开关的数量和传播延迟的度量，并且在辅助输入和垃圾输出的数量方面具有零开销。基于ORG-Ⅰ和ORG-Ⅱ可逆门的全光可逆加法器设计在MZI数、延迟、辅助输入数和垃圾输出数方面优于非光域可逆加法器的其他设计。提出的全光可逆涟漪进位加法器将是一个关键组成部分的全光可逆ALU，可以应用在各种各样的光信号处理应用。
In recent years reversible logic has emerged as a promising computing model for applications in dissipation less optical computing, low power CMOS, quantum computing, etc. In reversible circuits there exist a one-to-one mapping between the inputs and the outputs resulting in no loss of information. Researchers have implemented reversible logic gates in optical computing domain as it can provide high speed and low energy requirement along with easy fabrication at the chip level [1]. The all optical implementation of reversible gates are based on semiconductor optical amplifier (SOA) based Mach-Zehnder interferometer (MZI) due to its significant advantages such as high speed, low power, fast switching time and ease in fabrication. In this work we present the all optical implementation of an n bit reversible ripple carry adder for the first time in literature. The all optical reversible adder design is based on two new optical reversible gates referred as optical reversible gate I (ORG-I) and optical reversible gate II (ORG-II) and the existing all optical Feynman gate. The two new reversible gates ORG-I and ORGI-I are proposed as they can implement a reversible adder with reduced optical cost which is the measure of number of MZIs switches and the propagation delay, and with zero overhead in terms of number of ancilla inputs and the garbage outputs. The proposed all optical reversible adder design based on the ORG-I and ORG-II reversible gates are compared and shown to be better than the other existing designs of reversible adder proposed in non-optical domain in terms of number of MZIs, delay, number of ancilla inputs and the garbage outputs. The proposed all optical reversible ripple carry adder will be a key component of an all optical reversible ALU that can be applied in a wide variety of optical signal processing applications.