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Open AccessJournal ArticleDOI

64 and 128 coherent QAM optical transmission over 150 km using frequency-stabilized laser and heterodyne PLL detection.

Masato Yoshida, +3 more
- 21 Jan 2008 - 
- Vol. 16, Iss: 2, pp 829-840
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TLDR
This work describes 1 Gsymbol/s, 64 and 128 coherent quadrature amplitude modulation (QAM) transmissions over 150 km, in which a frequency-stabilized C( 2)H(2) fiber laser, an optical phase-looked loop (OPLL), and a heterodyne detection circuit are employed.
Abstract
We describe 1 Gsymbol/s, 64 and 128 coherent quadrature amplitude modulation (QAM) transmissions over 150 km, in which we employ a frequency-stabilized C2H2 fiber laser, an optical phase-looked loop (OPLL), and a heterodyne detection circuit.

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Citations
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Approaching the Non-Linear Shannon Limit

TL;DR: In this article, the authors review the recent progress of information theory in optical communications and describe the current experimental results and associated advances in various individual technologies which increase the information capacity, and confirm the widely held belief that the reported capacities are approaching the fundamental limits imposed by signal-to-noise ratio and the distributed nonlinearity of conventional optical fibres, resulting in the reduction in the growth rate of communication capacity.
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Recent advances in coherent optical communication

TL;DR: In this paper, a review of recent progress in coherent optical communication, a field revived by advances in digital signal processing (DSP), is reviewed, showing that DSP-based phase and polarization management techniques make coherent detection robust and practical.
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Unrepeated 200-km transmission of 40-Gbit/s 16-QAM signals using digital coherent receiver.

TL;DR: This work demonstrates unrepeated 200-km transmission of 40-Gbit/s 16-QAM signals using a digital coherent receiver, where the decision-directed carrier-phase estimation is employed and the phase fluctuation is effectively eliminated.
Journal ArticleDOI

256-QAM (64 Gb/s) Coherent Optical Transmission Over 160 km With an Optical Bandwidth of 5.4 GHz

TL;DR: In this article, a 4-Gsymbol/s 256 quadrature amplitude modulation (QAM) coherent optical transmission over 160 km was reported, and a 64-Gb/s data signal was successfully transmitted with an optical bandwidth of 5.4 GHz.
Journal ArticleDOI

Simplified coherent receiver with heterodyne detection of eight-channel 50 Gb/s PDM-QPSK WDM signal after 1040 km SMF-28 transmission

TL;DR: Using this scheme, it is successfully demonstrated the eight-channel 50 Gb/s polarization division multiplexed quadrature phase shift keying WDM signal with heterodyne detection based on digital signal processing over 1040 km single-mode fiber 28 with erbium-doped fiber amplifier only amplification.
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