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256 QAM Digital Coherent Optical Transmission Using Raman Amplifiers
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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.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E94-B No.2 pp.417-424
- Publication Date
- 2011/02/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E94.B.417
- Type of Manuscript
- Special Section PAPER (Special Section on Extremely Advanced Optical Transmission Technologies and Transmission Optical Fiber Technologies towards Exabit Era)
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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},}
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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 -
English
