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DSP-free and real-time NRZ transmission of 50 Gb/s over 15-km SSMF and 64 Gb/s back-to-back with a 1.3-mu m VCSEL

Laurens Breyne (UGent) , Michiel Verplaetse (UGent) , Christian Neumeyr, Timothy De Keulenaer (UGent) , Wouter Soenen (UGent) , Xin Yin (UGent) , Peter Ossieur (UGent) , Guy Torfs (UGent) and Johan Bauwelinck (UGent)
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Abstract
We demonstrate and analyze 50 Gb/s non-return-to-zero (NRZ) transmission over 15 km of standard single-mode fiber (SSMF), 60-Gb/s NRZ transmission over 5 km of SSMF and up to 64-Gb/s NRZ back-to-back using a directly modulated short-cavity long-wavelength single-mode vertical-cavity surface-emitting laser (VCSEL) emitting at 1326 nm. Owing to an analog 6-tap transmit feedforward equalizer, the link can operate without digital signal processing. In all three cases, real-time bit error ratio measurements below the 7% overhead hard-decision forward error correction threshold are demonstrated when transmitting a pseudorandom bit sequence with a period of 2(7) - 1 bits. In addition, we analyze the interplay between the residual fiber chromatic dispersion at the operating wavelength of the VCSEL and the chirp due to direct modulation. These results demonstrate how O-band, short-cavity long-wavelength single-mode VCSELs can be used in intradata center networks, as well as in interdata center networks at reaches below 15 km.
Keywords
MODULATION, CHIRP, Analog equalization, BiCMOS integrated circuits, chirp, fiber optics, communications, optical interconnections, vertical cavity surface, emitting lasers

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MLA
Breyne, Laurens, et al. “DSP-Free and Real-Time NRZ Transmission of 50 Gb/s over 15-Km SSMF and 64 Gb/s Back-to-Back with a 1.3-Mu m VCSEL.” JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 37, no. 1, 2019, pp. 170–77, doi:10.1109/JLT.2018.2885619.
APA
Breyne, L., Verplaetse, M., Neumeyr, C., De Keulenaer, T., Soenen, W., Yin, X., … Bauwelinck, J. (2019). DSP-free and real-time NRZ transmission of 50 Gb/s over 15-km SSMF and 64 Gb/s back-to-back with a 1.3-mu m VCSEL. JOURNAL OF LIGHTWAVE TECHNOLOGY, 37(1), 170–177. https://doi.org/10.1109/JLT.2018.2885619
Chicago author-date
Breyne, Laurens, Michiel Verplaetse, Christian Neumeyr, Timothy De Keulenaer, Wouter Soenen, Xin Yin, Peter Ossieur, Guy Torfs, and Johan Bauwelinck. 2019. “DSP-Free and Real-Time NRZ Transmission of 50 Gb/s over 15-Km SSMF and 64 Gb/s Back-to-Back with a 1.3-Mu m VCSEL.” JOURNAL OF LIGHTWAVE TECHNOLOGY 37 (1): 170–77. https://doi.org/10.1109/JLT.2018.2885619.
Chicago author-date (all authors)
Breyne, Laurens, Michiel Verplaetse, Christian Neumeyr, Timothy De Keulenaer, Wouter Soenen, Xin Yin, Peter Ossieur, Guy Torfs, and Johan Bauwelinck. 2019. “DSP-Free and Real-Time NRZ Transmission of 50 Gb/s over 15-Km SSMF and 64 Gb/s Back-to-Back with a 1.3-Mu m VCSEL.” JOURNAL OF LIGHTWAVE TECHNOLOGY 37 (1): 170–177. doi:10.1109/JLT.2018.2885619.
Vancouver
1.
Breyne L, Verplaetse M, Neumeyr C, De Keulenaer T, Soenen W, Yin X, et al. DSP-free and real-time NRZ transmission of 50 Gb/s over 15-km SSMF and 64 Gb/s back-to-back with a 1.3-mu m VCSEL. JOURNAL OF LIGHTWAVE TECHNOLOGY. 2019;37(1):170–7.
IEEE
[1]
L. Breyne et al., “DSP-free and real-time NRZ transmission of 50 Gb/s over 15-km SSMF and 64 Gb/s back-to-back with a 1.3-mu m VCSEL,” JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 37, no. 1, pp. 170–177, 2019.
@article{8637655,
  abstract     = {{We demonstrate and analyze 50 Gb/s non-return-to-zero (NRZ) transmission over 15 km of standard single-mode fiber (SSMF), 60-Gb/s NRZ transmission over 5 km of SSMF and up to 64-Gb/s NRZ back-to-back using a directly modulated short-cavity long-wavelength single-mode vertical-cavity surface-emitting laser (VCSEL) emitting at 1326 nm. Owing to an analog 6-tap transmit feedforward equalizer, the link can operate without digital signal processing. In all three cases, real-time bit error ratio measurements below the 7% overhead hard-decision forward error correction threshold are demonstrated when transmitting a pseudorandom bit sequence with a period of 2(7) - 1 bits. In addition, we analyze the interplay between the residual fiber chromatic dispersion at the operating wavelength of the VCSEL and the chirp due to direct modulation. These results demonstrate how O-band, short-cavity long-wavelength single-mode VCSELs can be used in intradata center networks, as well as in interdata center networks at reaches below 15 km.}},
  author       = {{Breyne, Laurens and Verplaetse, Michiel and Neumeyr, Christian and De Keulenaer, Timothy and Soenen, Wouter and Yin, Xin and Ossieur, Peter and Torfs, Guy and Bauwelinck, Johan}},
  issn         = {{0733-8724}},
  journal      = {{JOURNAL OF LIGHTWAVE TECHNOLOGY}},
  keywords     = {{MODULATION,CHIRP,Analog equalization,BiCMOS integrated circuits,chirp,fiber optics,communications,optical interconnections,vertical cavity surface,emitting lasers}},
  language     = {{eng}},
  location     = {{San Diego, CA}},
  number       = {{1}},
  pages        = {{170--177}},
  title        = {{DSP-free and real-time NRZ transmission of 50 Gb/s over 15-km SSMF and 64 Gb/s back-to-back with a 1.3-mu m VCSEL}},
  url          = {{http://dx.doi.org/10.1109/JLT.2018.2885619}},
  volume       = {{37}},
  year         = {{2019}},
}

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