Vector Modulation by Laser and Electroabsorption Modulator With Digital Pre-coding and Pre-compensation

IEEE We present a method to achieve vector modulation of lightwave using an electroabsorption modulator intregrated laser. The laser section is used for direct phase modulation followed by amplitude modulation of the electroabsorption modulator section in a cascade manner, which is an alternative me...

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Main Authors: Ukrit Mankong, Praimezt Mekbungwan, Keizo Inagaki, Tetsuya Kawanishi
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/59139
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-591392018-09-05T04:39:05Z Vector Modulation by Laser and Electroabsorption Modulator With Digital Pre-coding and Pre-compensation Ukrit Mankong Praimezt Mekbungwan Keizo Inagaki Tetsuya Kawanishi Physics and Astronomy IEEE We present a method to achieve vector modulation of lightwave using an electroabsorption modulator intregrated laser. The laser section is used for direct phase modulation followed by amplitude modulation of the electroabsorption modulator section in a cascade manner, which is an alternative method to conventional IQ modulator. To allow improved phase demodulation, we propose a digital pre-compensation technique for a transmitter in optical coherent system for the first time, which includes phase-balanced differential phase shift keying encoding and digital domain pre-equalization filtering. The phase-balanced encoding technique applies parallel DC-balance coding with phase-balanced symbol mapping, which results in bounded cumulative phase and constant statistical characteristic of the modulating signal in differential M-ary phase shift keying (M-PSK) and M-ary quadrature amplitude modulation (M-QAM) formats. The digital pre-equalization filter also compensates for the phase response of the laser section. Experimental results show that the pre-digital compensation technique allows the improved complex signal demodulation compared to conventional DQPSK modulation in a back-to-back setup. 2018-09-05T04:39:05Z 2018-09-05T04:39:05Z 2018-06-12 Journal 07338724 2-s2.0-85048546727 10.1109/JLT.2018.2846790 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85048546727&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/59139
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Physics and Astronomy
spellingShingle Physics and Astronomy
Ukrit Mankong
Praimezt Mekbungwan
Keizo Inagaki
Tetsuya Kawanishi
Vector Modulation by Laser and Electroabsorption Modulator With Digital Pre-coding and Pre-compensation
description IEEE We present a method to achieve vector modulation of lightwave using an electroabsorption modulator intregrated laser. The laser section is used for direct phase modulation followed by amplitude modulation of the electroabsorption modulator section in a cascade manner, which is an alternative method to conventional IQ modulator. To allow improved phase demodulation, we propose a digital pre-compensation technique for a transmitter in optical coherent system for the first time, which includes phase-balanced differential phase shift keying encoding and digital domain pre-equalization filtering. The phase-balanced encoding technique applies parallel DC-balance coding with phase-balanced symbol mapping, which results in bounded cumulative phase and constant statistical characteristic of the modulating signal in differential M-ary phase shift keying (M-PSK) and M-ary quadrature amplitude modulation (M-QAM) formats. The digital pre-equalization filter also compensates for the phase response of the laser section. Experimental results show that the pre-digital compensation technique allows the improved complex signal demodulation compared to conventional DQPSK modulation in a back-to-back setup.
format Journal
author Ukrit Mankong
Praimezt Mekbungwan
Keizo Inagaki
Tetsuya Kawanishi
author_facet Ukrit Mankong
Praimezt Mekbungwan
Keizo Inagaki
Tetsuya Kawanishi
author_sort Ukrit Mankong
title Vector Modulation by Laser and Electroabsorption Modulator With Digital Pre-coding and Pre-compensation
title_short Vector Modulation by Laser and Electroabsorption Modulator With Digital Pre-coding and Pre-compensation
title_full Vector Modulation by Laser and Electroabsorption Modulator With Digital Pre-coding and Pre-compensation
title_fullStr Vector Modulation by Laser and Electroabsorption Modulator With Digital Pre-coding and Pre-compensation
title_full_unstemmed Vector Modulation by Laser and Electroabsorption Modulator With Digital Pre-coding and Pre-compensation
title_sort vector modulation by laser and electroabsorption modulator with digital pre-coding and pre-compensation
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85048546727&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/59139
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