Design of XOR Photonic Gate using Highly Nonlinear Fiber

Mohammed Jasim,Adel Aldalbahi

doi:10.3390/electronics8020215

Abstract

In this paper, a comprehensive design and simulation of an all-photonic XOR logic gate is proposed. The design is based on the third-order Kerr nonlinear effect in highly nonlinear fiber, i.e., utilizing the self-phase and cross-phase modulations phenomena. This work presents the first photonic logic gate based on highly nonlinear fiber component only that achieves a data rate of 20 Gbps. Moreover, the design is based on two input binary bit sequences, narrow pulsed by a Gaussian distribution as 8-bit incoming data streams. Also, optical cross connectors with different coupling coefficients are used to generate pump and probe signals and tuneable optical band pass filters are leveraged to perform the logic gate functionalities. Remarkable performance outcomes are concluded from the eye pattern diagram and bit error rate analyzers. Simulation results show that the proposed XOR optical logic gate design is achieved at very low power penalties, low bit error rates, a significant Q-factor, and high extinction ratios as compared to existing methods.

Highlights

The evolution of all-optical signal processing is increasing in demand towards the implantation of ultra-high-speed photonic networks, such as optical packet switching
Conventional designs for photonic logic gates are based upon nonlinear effects in optical fiber such as four wave mixing, Self-Phase Modulation (SPM), Cross-Phase Modulation (XPM), and cross gain modulation in semiconductor optical amplifiers (SOA) and highly nonlinear fiber (HNLF)
The phenomena of SPM and XPM are captured in the effect of the spectral broadening toward blue and red spectral edges

Summary

Introduction

The evolution of all-optical signal processing is increasing in demand towards the implantation of ultra-high-speed photonic networks, such as optical packet switching. Conventional designs for photonic logic gates are based upon nonlinear effects in optical fiber such as four wave mixing, Self-Phase Modulation (SPM), Cross-Phase Modulation (XPM), and cross gain modulation in semiconductor optical amplifiers (SOA) and highly nonlinear fiber (HNLF). These nonlinear effects exist mostly in SOA and HNLF, and can be used in many applications. In light of the above, the work here aims to utilize HNLF for all-optical XOR photonic logic gates to overcome the deficiencies associated with SOA, i.e., enhanced power efficiency, and ring resonators.

Design of XOR Photonic Logic Gate

Design

Band Pass Filter Stages for the XOR Gate

Output spectrum

Conclusions