Suppression of large error floor in 1024 QAM digital coherent transmission by compensating for GAWBS phase noise

Masato Yoshida; Naoya Takefushi; Keisuke Kasai; Toshihiko Hirooka; Masataka Nakazawa

doi:10.1364/OE.27.036691

Suppression of large error floor in 1024 QAM digital coherent transmission by compensating for GAWBS phase noise

Masato Yoshida, Naoya Takefushi, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa

Broadband Engineering Division

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

There is a large error floor in an ultra multi-level digital coherent transmission signal of 1024 QAM or higher, and we have yet to determine its origin. In this paper, we show that this large error floor results from guided acoustic-wave Brillouin scattering (GAWBS) phase noise. We prove experimentally that such an error floor can be greatly reduced by compensating for the GAWBS noise with a phase modulation technique. We show that the BER of a 1024 QAM signal was reduced from 8.7 × 10⁻⁴ to 2.7 × 10⁻⁴ after a 160 km transmission with GAWBS noise compensation. Furthermore, we successfully extend the transmission distance from 160 to 240 km with a 7% overhead forward error correction.

Original language	English
Pages (from-to)	36691-36698
Number of pages	8
Journal	Optics Express
Volume	27
Issue number	25
DOIs	https://doi.org/10.1364/OE.27.036691
Publication status	Published - 2019 Dec 9

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Suppression of large error floor in 1024 QAM digital coherent transmission by compensating for GAWBS phase noise",

abstract = "There is a large error floor in an ultra multi-level digital coherent transmission signal of 1024 QAM or higher, and we have yet to determine its origin. In this paper, we show that this large error floor results from guided acoustic-wave Brillouin scattering (GAWBS) phase noise. We prove experimentally that such an error floor can be greatly reduced by compensating for the GAWBS noise with a phase modulation technique. We show that the BER of a 1024 QAM signal was reduced from 8.7 × 10−4 to 2.7 × 10−4 after a 160 km transmission with GAWBS noise compensation. Furthermore, we successfully extend the transmission distance from 160 to 240 km with a 7% overhead forward error correction.",

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AU - Yoshida, Masato

AU - Takefushi, Naoya

AU - Kasai, Keisuke

AU - Hirooka, Toshihiko

AU - Nakazawa, Masataka

N1 - Funding Information: Ministry of Internal Affairs and Communications; Research and Development of Innovative Optical Network Technology for a Novel Social Infrastructure. Publisher Copyright: © 2019 Optical Society of America.

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Y1 - 2019/12/9

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AB - There is a large error floor in an ultra multi-level digital coherent transmission signal of 1024 QAM or higher, and we have yet to determine its origin. In this paper, we show that this large error floor results from guided acoustic-wave Brillouin scattering (GAWBS) phase noise. We prove experimentally that such an error floor can be greatly reduced by compensating for the GAWBS noise with a phase modulation technique. We show that the BER of a 1024 QAM signal was reduced from 8.7 × 10−4 to 2.7 × 10−4 after a 160 km transmission with GAWBS noise compensation. Furthermore, we successfully extend the transmission distance from 160 to 240 km with a 7% overhead forward error correction.

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Suppression of large error floor in 1024 QAM digital coherent transmission by compensating for GAWBS phase noise

Abstract

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