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A novel proposal for all-optical XOR/XNOR gate using a nonlinear photonic crystal based ring resonator

Asghari Mehrnoush, Moloudian Gholamhosein, Hassangholizadeh-Kashtiban Mahdi

Optica Applicata

2019

Vol. 49, nr 2

283--291

Optical logic gates are very important structures required for creating all-optical digital signal processing systems. Optical XOR and XNOR gates can be used for designing optical adders and optical comparators, respectively. In this paper we proposed a novel structure which can be used for simultaneous implementation of optical XOR and XNOR logic gates. The proposed structure was designed using a nonlinear photonic crystal ring resonator. The delay time for XOR and XNOR gates are 1.7 and 3 ps, respectively.

All-optical parity generator and checker circuit employing semiconductor optical amplifier-based Mach–Zehnder interferometers

Kaur S., Shukla M. K.

Optica Applicata

2017

Vol. 47, nr 2

263--271

Checking the parity of the data signal during transmission and reception is one way to ensure errorless transmission of data. In this communication the authors propose a method to implement an all-optical parity generator and checker using semiconductor optical amplifier-based Mach–Zehnder interferometers. The scheme, able to process input signals at the same wavelength, is characterized using return-to-zero modulated signals at 10 Gb/s. Correct logic bit sequences and clear open eye patterns with extinction ratios exceeding 10 dB are achieved. Simple structure and potential for integration make this architecture an interesting approach in photonic computing and optical signal processing.

Study of all-optical logic XOR gate based on linear optical amplifier cross-gain modulation

Li X, Jin J, Li H, Zhang Q

Optica Applicata

2015

Vol. 45, nr 4

447--457

All-optical logic is the key to future high speed and large capacity optical transmission, the realization of optical packet switching and optical computing, and it has a very profound influence on the development of future optical communication. A linear optical amplifier as a new type of semiconductor optical amplifier, which has a good gain characteristic, has better signal performance than a traditional semiconductor optical amplifier in the wavelength conversion. This article presents a numerical simulation model of all-optical logic XOR gate and its logic operation based on cross-gain modulation of linear optical amplifier, and has also completed some of the basic logic operations, including AND, OR, NOT operations.