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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
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Pour répondre à la demande croissante d'extension de la capacité de transmission par multiplexage par répartition en longueur d'onde (WDM), la transmission optique cohérente à très haute densité spectrale employant des formats de modulation multi-niveaux a attiré beaucoup d'attention. En particulier, la modulation d'amplitude en quadrature (QAM) multi-niveaux ultra-élevée présente un énorme avantage en termes d'extension de l'efficacité spectrale à 10 bit/s/Hz et même d'approche de la limite de Shannon. Nous décrivons les technologies fondamentales pour la transmission QAM cohérente à très haute densité spectrale et présentons des résultats expérimentaux sur la transmission optique cohérente QAM 256 multiplexée en polarisation utilisant la détection hétérodyne et homodyne avec un laser stabilisé en fréquence et une technique de boucle optique à verrouillage de phase. Dans cette expérience, des amplificateurs Raman ont été récemment adoptés pour diminuer la puissance du signal, ce qui peut réduire la non-linéarité de la fibre. En conséquence, la pénalité de puissance a été réduite de 5.3 à 2.0 dB. Un signal de données de 64 Gbit/s est transmis avec succès sur 160 km avec une bande passante optique de 5.4 GHz.
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Masato YOSHIDA, Seiji OKAMOTO, Tatsunori OMIYA, Keisuke KASAI, Masataka NAKAZAWA, "256 QAM Digital Coherent Optical Transmission Using Raman Amplifiers" in IEICE TRANSACTIONS on Communications,
vol. E94-B, no. 2, pp. 417-424, February 2011, doi: 10.1587/transcom.E94.B.417.
Abstract: To meet the increasing demand to expand wavelength division multiplexing (WDM) transmission capacity, ultrahigh spectral density coherent optical transmission employing multi-level modulation formats has attracted a lot of attention. In particular, ultrahigh multi-level quadrature amplitude modulation (QAM) has an enormous advantage as regards expanding the spectral efficiency to 10 bit/s/Hz and even approaching the Shannon limit. We describe fundamental technologies for ultrahigh spectral density coherent QAM transmission and present experimental results on polarization-multiplexed 256 QAM coherent optical transmission using heterodyne and homodyne detection with a frequency-stabilized laser and an optical phase-locked loop technique. In this experiment, Raman amplifiers are newly adopted to decrease the signal power, which can reduce the fiber nonlinearity. As a result, the power penalty was reduced from 5.3 to 2.0 dB. A 64 Gbit/s data signal is successfully transmitted over 160 km with an optical bandwidth of 5.4 GHz.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E94.B.417/_p
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@ARTICLE{e94-b_2_417,
author={Masato YOSHIDA, Seiji OKAMOTO, Tatsunori OMIYA, Keisuke KASAI, Masataka NAKAZAWA, },
journal={IEICE TRANSACTIONS on Communications},
title={256 QAM Digital Coherent Optical Transmission Using Raman Amplifiers},
year={2011},
volume={E94-B},
number={2},
pages={417-424},
abstract={To meet the increasing demand to expand wavelength division multiplexing (WDM) transmission capacity, ultrahigh spectral density coherent optical transmission employing multi-level modulation formats has attracted a lot of attention. In particular, ultrahigh multi-level quadrature amplitude modulation (QAM) has an enormous advantage as regards expanding the spectral efficiency to 10 bit/s/Hz and even approaching the Shannon limit. We describe fundamental technologies for ultrahigh spectral density coherent QAM transmission and present experimental results on polarization-multiplexed 256 QAM coherent optical transmission using heterodyne and homodyne detection with a frequency-stabilized laser and an optical phase-locked loop technique. In this experiment, Raman amplifiers are newly adopted to decrease the signal power, which can reduce the fiber nonlinearity. As a result, the power penalty was reduced from 5.3 to 2.0 dB. A 64 Gbit/s data signal is successfully transmitted over 160 km with an optical bandwidth of 5.4 GHz.},
keywords={},
doi={10.1587/transcom.E94.B.417},
ISSN={1745-1345},
month={February},}
Copier
TY - JOUR
TI - 256 QAM Digital Coherent Optical Transmission Using Raman Amplifiers
T2 - IEICE TRANSACTIONS on Communications
SP - 417
EP - 424
AU - Masato YOSHIDA
AU - Seiji OKAMOTO
AU - Tatsunori OMIYA
AU - Keisuke KASAI
AU - Masataka NAKAZAWA
PY - 2011
DO - 10.1587/transcom.E94.B.417
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E94-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2011
AB - To meet the increasing demand to expand wavelength division multiplexing (WDM) transmission capacity, ultrahigh spectral density coherent optical transmission employing multi-level modulation formats has attracted a lot of attention. In particular, ultrahigh multi-level quadrature amplitude modulation (QAM) has an enormous advantage as regards expanding the spectral efficiency to 10 bit/s/Hz and even approaching the Shannon limit. We describe fundamental technologies for ultrahigh spectral density coherent QAM transmission and present experimental results on polarization-multiplexed 256 QAM coherent optical transmission using heterodyne and homodyne detection with a frequency-stabilized laser and an optical phase-locked loop technique. In this experiment, Raman amplifiers are newly adopted to decrease the signal power, which can reduce the fiber nonlinearity. As a result, the power penalty was reduced from 5.3 to 2.0 dB. A 64 Gbit/s data signal is successfully transmitted over 160 km with an optical bandwidth of 5.4 GHz.
ER -