High Spectral Efficiency 400 Gb/s Transmission by Different Modulation Formats and Advanced DSP

Miao Kong; Xinying Li; Jiao Zhang; Kaihui Wang; Xiangjun Xin; Feng Zhao; Jianjun Yu

doi:10.1109/JLT.2019.2932384

High Spectral Efficiency 400 Gb/s Transmission by Different Modulation Formats and Advanced DSP

Miao Kong, Xinying Li, Jiao Zhang, Kaihui Wang, Xiangjun Xin, Feng Zhao, Jianjun Yu^*

^*Corresponding author for this work

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

33 Citations (Scopus)

Abstract

We experimentally demonstrate probabilistically shaped 64-ary quadrature-amplitude-modulation (64QAM) 50-GHz-grid wavelength-division-multiplexing (WDM) transmission with a bit rate of 400-Gbit/s per channel over 3,600-km Raman-amplified ultra-large effective area fiber (ULAF). Our results show that the probabilistically shaped 64QAM outperforms the hybrid-32/64QAM by 50% reach improvement. Thanks to pre-equalization and look-up-table pre-distortion, a 5.5-dB optical signal-to-noise ratio (OSNR) gain can be obtained. Furthermore, utilizing ULAF with Raman amplifier causes an apparent improvement on the transmission performance compared with using the SSMF with EDFA. We also compare the optical coupler with the wavelength selective switch utilized in the WDM system to explore a suitable way for WDM transmission. Advanced DSP including Butterworth low-pass digital filter is also used at the receiver end.

Original language	English
Article number	8784236
Pages (from-to)	5317-5325
Number of pages	9
Journal	Journal of Lightwave Technology
Volume	37
Issue number	20
DOIs	https://doi.org/10.1109/JLT.2019.2932384
Publication status	Published - 15 Oct 2019
Externally published	Yes

Keywords

Hybrid quadrature-amplitude-modulation (hybrid-QAM)
look-up-table (LUT) pre-distortion
optical coupler
pre-equalization
probabilistic shaping
ultra large effective area fiber (ULAF)

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10.1109/JLT.2019.2932384

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title = "High Spectral Efficiency 400 Gb/s Transmission by Different Modulation Formats and Advanced DSP",

abstract = "We experimentally demonstrate probabilistically shaped 64-ary quadrature-amplitude-modulation (64QAM) 50-GHz-grid wavelength-division-multiplexing (WDM) transmission with a bit rate of 400-Gbit/s per channel over 3,600-km Raman-amplified ultra-large effective area fiber (ULAF). Our results show that the probabilistically shaped 64QAM outperforms the hybrid-32/64QAM by 50% reach improvement. Thanks to pre-equalization and look-up-table pre-distortion, a 5.5-dB optical signal-to-noise ratio (OSNR) gain can be obtained. Furthermore, utilizing ULAF with Raman amplifier causes an apparent improvement on the transmission performance compared with using the SSMF with EDFA. We also compare the optical coupler with the wavelength selective switch utilized in the WDM system to explore a suitable way for WDM transmission. Advanced DSP including Butterworth low-pass digital filter is also used at the receiver end.",

keywords = "Hybrid quadrature-amplitude-modulation (hybrid-QAM), look-up-table (LUT) pre-distortion, optical coupler, pre-equalization, probabilistic shaping, ultra large effective area fiber (ULAF)",

author = "Miao Kong and Xinying Li and Jiao Zhang and Kaihui Wang and Xiangjun Xin and Feng Zhao and Jianjun Yu",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.",

year = "2019",

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doi = "10.1109/JLT.2019.2932384",

language = "English",

volume = "37",

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AU - Kong, Miao

AU - Li, Xinying

AU - Zhang, Jiao

AU - Wang, Kaihui

AU - Xin, Xiangjun

AU - Zhao, Feng

AU - Yu, Jianjun

PY - 2019/10/15

Y1 - 2019/10/15

N2 - We experimentally demonstrate probabilistically shaped 64-ary quadrature-amplitude-modulation (64QAM) 50-GHz-grid wavelength-division-multiplexing (WDM) transmission with a bit rate of 400-Gbit/s per channel over 3,600-km Raman-amplified ultra-large effective area fiber (ULAF). Our results show that the probabilistically shaped 64QAM outperforms the hybrid-32/64QAM by 50% reach improvement. Thanks to pre-equalization and look-up-table pre-distortion, a 5.5-dB optical signal-to-noise ratio (OSNR) gain can be obtained. Furthermore, utilizing ULAF with Raman amplifier causes an apparent improvement on the transmission performance compared with using the SSMF with EDFA. We also compare the optical coupler with the wavelength selective switch utilized in the WDM system to explore a suitable way for WDM transmission. Advanced DSP including Butterworth low-pass digital filter is also used at the receiver end.

AB - We experimentally demonstrate probabilistically shaped 64-ary quadrature-amplitude-modulation (64QAM) 50-GHz-grid wavelength-division-multiplexing (WDM) transmission with a bit rate of 400-Gbit/s per channel over 3,600-km Raman-amplified ultra-large effective area fiber (ULAF). Our results show that the probabilistically shaped 64QAM outperforms the hybrid-32/64QAM by 50% reach improvement. Thanks to pre-equalization and look-up-table pre-distortion, a 5.5-dB optical signal-to-noise ratio (OSNR) gain can be obtained. Furthermore, utilizing ULAF with Raman amplifier causes an apparent improvement on the transmission performance compared with using the SSMF with EDFA. We also compare the optical coupler with the wavelength selective switch utilized in the WDM system to explore a suitable way for WDM transmission. Advanced DSP including Butterworth low-pass digital filter is also used at the receiver end.

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KW - pre-equalization

KW - probabilistic shaping

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ER -

High Spectral Efficiency 400 Gb/s Transmission by Different Modulation Formats and Advanced DSP

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Keywords

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