Real & Simulated QPSK Up-Converted Signals by a Sampling Method Using a Cascaded MZMs Link

This study focuses on a novel concept of transmitting of a quadrature phase shift keying (QPSK) modulation by an electro-optical frequency up-conversion using a cascaded Mach–Zehnder modulators (MZMs) link. Furthermore, we conduct and compare the results obtained by simulations using the Virtual Pho...

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Main Authors: Hassan Termos, Ali Nansour
Format: Article
Language:English
Published: MDPI AG 2022-01-01
Series:Photonics
Subjects:
Online Access:https://www.mdpi.com/2304-6732/9/1/34
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author Hassan Termos
Ali Nansour
author_facet Hassan Termos
Ali Nansour
author_sort Hassan Termos
collection DOAJ
description This study focuses on a novel concept of transmitting of a quadrature phase shift keying (QPSK) modulation by an electro-optical frequency up-conversion using a cascaded Mach–Zehnder modulators (MZMs) link. Furthermore, we conduct and compare the results obtained by simulations using the Virtual Photonics Inc. (VPI) (Berlin, Germany) simulator and real-world experiments. The design and operating regime peculiarities of the MZM used as a sampling up-converter mixer in a radio over fiber (RoF) system are also analyzed. Besides, the simulation and experimental results of static and dynamic characteristics of the MZM have approximately the same behavior. The conversion gain of the cascaded MZMs link is simulated over many mixing frequencies and it can decrease from 17.5 dB at 8.3 GHz to −4.5 dB at 39.5 GHz. However, in real world settings, it may decrease from 15.5 dB at 8.3 GHz to −6 dB at 39.5 GHz. The maximum frequency range is attained at 78.5 GHz for up-conversion through simulations. Error vector magnitude (EVM) values have been done to evaluate the performance of our system. An EVM of 16% at a mixing frequency of 39.5 GHz with a bit rate of 12.5 Gbit/s was observed with the considering sampling technique, while it reached 19% in real-world settings with a sampling frequency of 39.5 GHz and a bit rate of 12.5 Gbit/s.
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spelling doaj.art-e718071b7d1f44f8ae4d3cf9def2de3a2023-11-23T15:06:21ZengMDPI AGPhotonics2304-67322022-01-01913410.3390/photonics9010034Real & Simulated QPSK Up-Converted Signals by a Sampling Method Using a Cascaded MZMs LinkHassan Termos0Ali Nansour1Lab-STICC, CNRS UMR 6285, ENSTA Bretagne, 2 Rue François Verny, CEDEX 09, 29806 Brest, FranceLab-STICC, CNRS UMR 6285, ENSTA Bretagne, 2 Rue François Verny, CEDEX 09, 29806 Brest, FranceThis study focuses on a novel concept of transmitting of a quadrature phase shift keying (QPSK) modulation by an electro-optical frequency up-conversion using a cascaded Mach–Zehnder modulators (MZMs) link. Furthermore, we conduct and compare the results obtained by simulations using the Virtual Photonics Inc. (VPI) (Berlin, Germany) simulator and real-world experiments. The design and operating regime peculiarities of the MZM used as a sampling up-converter mixer in a radio over fiber (RoF) system are also analyzed. Besides, the simulation and experimental results of static and dynamic characteristics of the MZM have approximately the same behavior. The conversion gain of the cascaded MZMs link is simulated over many mixing frequencies and it can decrease from 17.5 dB at 8.3 GHz to −4.5 dB at 39.5 GHz. However, in real world settings, it may decrease from 15.5 dB at 8.3 GHz to −6 dB at 39.5 GHz. The maximum frequency range is attained at 78.5 GHz for up-conversion through simulations. Error vector magnitude (EVM) values have been done to evaluate the performance of our system. An EVM of 16% at a mixing frequency of 39.5 GHz with a bit rate of 12.5 Gbit/s was observed with the considering sampling technique, while it reached 19% in real-world settings with a sampling frequency of 39.5 GHz and a bit rate of 12.5 Gbit/s.https://www.mdpi.com/2304-6732/9/1/34electro-optical mixerfrequency up-conversionMach–Zehnder modulatorquadrature phase shift keying
spellingShingle Hassan Termos
Ali Nansour
Real & Simulated QPSK Up-Converted Signals by a Sampling Method Using a Cascaded MZMs Link
Photonics
electro-optical mixer
frequency up-conversion
Mach–Zehnder modulator
quadrature phase shift keying
title Real & Simulated QPSK Up-Converted Signals by a Sampling Method Using a Cascaded MZMs Link
title_full Real & Simulated QPSK Up-Converted Signals by a Sampling Method Using a Cascaded MZMs Link
title_fullStr Real & Simulated QPSK Up-Converted Signals by a Sampling Method Using a Cascaded MZMs Link
title_full_unstemmed Real & Simulated QPSK Up-Converted Signals by a Sampling Method Using a Cascaded MZMs Link
title_short Real & Simulated QPSK Up-Converted Signals by a Sampling Method Using a Cascaded MZMs Link
title_sort real simulated qpsk up converted signals by a sampling method using a cascaded mzms link
topic electro-optical mixer
frequency up-conversion
Mach–Zehnder modulator
quadrature phase shift keying
url https://www.mdpi.com/2304-6732/9/1/34
work_keys_str_mv AT hassantermos realsimulatedqpskupconvertedsignalsbyasamplingmethodusingacascadedmzmslink
AT alinansour realsimulatedqpskupconvertedsignalsbyasamplingmethodusingacascadedmzmslink