Spectrally efficient pilot tone-based compensation of inter-channel cross-phase modulation noise in a WDM coherent transmission using injection locking

Takashi Kan; Kozo Sato; Masato Yoshida; Toshihiko Hirooka; Keisuke Kasai; Masataka Nakazawa

doi:10.1364/OE.414381

Spectrally efficient pilot tone-based compensation of inter-channel cross-phase modulation noise in a WDM coherent transmission using injection locking

Takashi Kan, Kozo Sato, Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa

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

3 Citations (Scopus)

Abstract

We propose the precise and wideband compensation of the nonlinear phase noise caused by cross-phase modulation (XPM) among WDM channels using a pilot tone (PT) and injection locking for short-reach, higher-order QAM transmission. A high spectral efficiency is maintained by sharing a single PT among multiple channels. We describe a 60 ch, 3 Gbaud PDM−256 QAM transmission over 160 km, where the bit error rate was improved from 6 × 10⁻³ to 2 × 10⁻³ by employing the proposed XPM compensation technique, with a spectral efficiency of 10.3 bit/s/Hz. We also analyze the influence of the group delay caused by fiber chromatic dispersion that determines the compensation range achievable with a single PT. We obtained good agreement with the experimental results.

Original language	English
Pages (from-to)	1454-1469
Number of pages	16
Journal	Optics Express
Volume	29
Issue number	2
DOIs	https://doi.org/10.1364/OE.414381
Publication status	Published - 2021 Jan 18

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.414381

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Spectrally efficient pilot tone-based compensation of inter-channel cross-phase modulation noise in a WDM coherent transmission using injection locking. / Kan, Takashi; Sato, Kozo; Yoshida, Masato ; Hirooka, Toshihiko ; Kasai, Keisuke ; Nakazawa, Masataka.

In: Optics Express, Vol. 29, No. 2, 18.01.2021, p. 1454-1469.

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

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abstract = "We propose the precise and wideband compensation of the nonlinear phase noise caused by cross-phase modulation (XPM) among WDM channels using a pilot tone (PT) and injection locking for short-reach, higher-order QAM transmission. A high spectral efficiency is maintained by sharing a single PT among multiple channels. We describe a 60 ch, 3 Gbaud PDM−256 QAM transmission over 160 km, where the bit error rate was improved from 6 × 10−3 to 2 × 10−3 by employing the proposed XPM compensation technique, with a spectral efficiency of 10.3 bit/s/Hz. We also analyze the influence of the group delay caused by fiber chromatic dispersion that determines the compensation range achievable with a single PT. We obtained good agreement with the experimental results.",

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AU - Kan, Takashi

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AU - Yoshida, Masato

AU - Hirooka, Toshihiko

AU - Kasai, Keisuke

AU - Nakazawa, Masataka

N1 - Funding Information: Funding. Japan Society for the Promotion of Science (JP19J12822); Ministry of Internal Affairs and Communications, Research and Development of Innovative Optical Network Technology for a Novel Social Infrastructure (JPMI00316). Publisher Copyright: © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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N2 - We propose the precise and wideband compensation of the nonlinear phase noise caused by cross-phase modulation (XPM) among WDM channels using a pilot tone (PT) and injection locking for short-reach, higher-order QAM transmission. A high spectral efficiency is maintained by sharing a single PT among multiple channels. We describe a 60 ch, 3 Gbaud PDM−256 QAM transmission over 160 km, where the bit error rate was improved from 6 × 10−3 to 2 × 10−3 by employing the proposed XPM compensation technique, with a spectral efficiency of 10.3 bit/s/Hz. We also analyze the influence of the group delay caused by fiber chromatic dispersion that determines the compensation range achievable with a single PT. We obtained good agreement with the experimental results.

AB - We propose the precise and wideband compensation of the nonlinear phase noise caused by cross-phase modulation (XPM) among WDM channels using a pilot tone (PT) and injection locking for short-reach, higher-order QAM transmission. A high spectral efficiency is maintained by sharing a single PT among multiple channels. We describe a 60 ch, 3 Gbaud PDM−256 QAM transmission over 160 km, where the bit error rate was improved from 6 × 10−3 to 2 × 10−3 by employing the proposed XPM compensation technique, with a spectral efficiency of 10.3 bit/s/Hz. We also analyze the influence of the group delay caused by fiber chromatic dispersion that determines the compensation range achievable with a single PT. We obtained good agreement with the experimental results.

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Spectrally efficient pilot tone-based compensation of inter-channel cross-phase modulation noise in a WDM coherent transmission using injection locking

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