4:1 Silicon Photonic Serializer for Data Center Interconnects Demonstrating 104 Gbaud OOK and PAM4 Transmission

Jochem Verbist, Michael Vanhoecke*, Mads Lillieholm, Srinivasan Ashwyn Srinivasan, Peter De Heyn, Joris Van Campenhout, Michael Galili, Leif Katsuo Oxenløwe, Xin Yin, Johan Bauwelinck, Gunther Roelkens

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

With next-generation optical interconnects for data centers aiming for 0.8 Tb/s or 1.6 Tb/s, 100 Gbaud capable transmitters from a single-laser source will become indispensable. However, these lane rates would require bandwidths of 70 GHz or more, doubling the bandwidth requirements of the electrical and optical components with respect to the fastest current generation of optical interconnects running at 53 Gbaud PAM-4. In this paper, we propose an integrated 4:1 optical serializer topology to achieve 104 Gbaud NRZ and PAM-4 transmission using only quarter rate components at the transmitter. We show 104 (208) Gbit/s OOK (PAM4) transmission using four GeSi EAMs over 1 km of SMF. For 104 Gbaud OOK, clearly open eyes are obtained, while for PAM-4 the performance is limited by the non-linear E/O-transfer function of the EAM. However, adding pre-emphasis in the electrical driver or replacing the single EAM with our previously demonstrated optical DAC topology -consisting of two EAMs in parallel with a 90° phase difference between each- could substantially improve these results. Additionally, we discuss the possibility of a four channel transmitter (4 x 208 Gb/s) from a single mode locked laser, amounting to a 832 Gb/s rate based on the current demonstrator.
Original languageEnglish
JournalJournal of Lightwave Technology
Volume37
Issue number5
Pages (from-to)1498-1503
ISSN0733-8724
DOIs
Publication statusPublished - 2019

Keywords

  • Integrated optics
  • Optical interconnects
  • Silicon photonics
  • Waveguide modulators

Cite this

Verbist, Jochem ; Vanhoecke, Michael ; Lillieholm, Mads ; Srinivasan, Srinivasan Ashwyn ; De Heyn, Peter ; Van Campenhout, Joris ; Galili, Michael ; Oxenløwe, Leif Katsuo ; Yin, Xin ; Bauwelinck, Johan ; Roelkens, Gunther. / 4:1 Silicon Photonic Serializer for Data Center Interconnects Demonstrating 104 Gbaud OOK and PAM4 Transmission. In: Journal of Lightwave Technology. 2019 ; Vol. 37, No. 5. pp. 1498-1503.
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title = "4:1 Silicon Photonic Serializer for Data Center Interconnects Demonstrating 104 Gbaud OOK and PAM4 Transmission",
abstract = "With next-generation optical interconnects for data centers aiming for 0.8 Tb/s or 1.6 Tb/s, 100 Gbaud capable transmitters from a single-laser source will become indispensable. However, these lane rates would require bandwidths of 70 GHz or more, doubling the bandwidth requirements of the electrical and optical components with respect to the fastest current generation of optical interconnects running at 53 Gbaud PAM-4. In this paper, we propose an integrated 4:1 optical serializer topology to achieve 104 Gbaud NRZ and PAM-4 transmission using only quarter rate components at the transmitter. We show 104 (208) Gbit/s OOK (PAM4) transmission using four GeSi EAMs over 1 km of SMF. For 104 Gbaud OOK, clearly open eyes are obtained, while for PAM-4 the performance is limited by the non-linear E/O-transfer function of the EAM. However, adding pre-emphasis in the electrical driver or replacing the single EAM with our previously demonstrated optical DAC topology -consisting of two EAMs in parallel with a 90° phase difference between each- could substantially improve these results. Additionally, we discuss the possibility of a four channel transmitter (4 x 208 Gb/s) from a single mode locked laser, amounting to a 832 Gb/s rate based on the current demonstrator.",
keywords = "Integrated optics, Optical interconnects, Silicon photonics, Waveguide modulators",
author = "Jochem Verbist and Michael Vanhoecke and Mads Lillieholm and Srinivasan, {Srinivasan Ashwyn} and {De Heyn}, Peter and {Van Campenhout}, Joris and Michael Galili and Oxenl{\o}we, {Leif Katsuo} and Xin Yin and Johan Bauwelinck and Gunther Roelkens",
year = "2019",
doi = "10.1109/JLT.2019.2897401",
language = "English",
volume = "37",
pages = "1498--1503",
journal = "Journal of Lightwave Technology",
issn = "0733-8724",
publisher = "Institute of Electrical and Electronics Engineers",
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Verbist, J, Vanhoecke, M, Lillieholm, M, Srinivasan, SA, De Heyn, P, Van Campenhout, J, Galili, M, Oxenløwe, LK, Yin, X, Bauwelinck, J & Roelkens, G 2019, '4:1 Silicon Photonic Serializer for Data Center Interconnects Demonstrating 104 Gbaud OOK and PAM4 Transmission', Journal of Lightwave Technology, vol. 37, no. 5, pp. 1498-1503. https://doi.org/10.1109/JLT.2019.2897401

4:1 Silicon Photonic Serializer for Data Center Interconnects Demonstrating 104 Gbaud OOK and PAM4 Transmission. / Verbist, Jochem; Vanhoecke, Michael; Lillieholm, Mads; Srinivasan, Srinivasan Ashwyn; De Heyn, Peter; Van Campenhout, Joris; Galili, Michael; Oxenløwe, Leif Katsuo; Yin, Xin; Bauwelinck, Johan; Roelkens, Gunther.

In: Journal of Lightwave Technology, Vol. 37, No. 5, 2019, p. 1498-1503.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - 4:1 Silicon Photonic Serializer for Data Center Interconnects Demonstrating 104 Gbaud OOK and PAM4 Transmission

AU - Verbist, Jochem

AU - Vanhoecke, Michael

AU - Lillieholm, Mads

AU - Srinivasan, Srinivasan Ashwyn

AU - De Heyn, Peter

AU - Van Campenhout, Joris

AU - Galili, Michael

AU - Oxenløwe, Leif Katsuo

AU - Yin, Xin

AU - Bauwelinck, Johan

AU - Roelkens, Gunther

PY - 2019

Y1 - 2019

N2 - With next-generation optical interconnects for data centers aiming for 0.8 Tb/s or 1.6 Tb/s, 100 Gbaud capable transmitters from a single-laser source will become indispensable. However, these lane rates would require bandwidths of 70 GHz or more, doubling the bandwidth requirements of the electrical and optical components with respect to the fastest current generation of optical interconnects running at 53 Gbaud PAM-4. In this paper, we propose an integrated 4:1 optical serializer topology to achieve 104 Gbaud NRZ and PAM-4 transmission using only quarter rate components at the transmitter. We show 104 (208) Gbit/s OOK (PAM4) transmission using four GeSi EAMs over 1 km of SMF. For 104 Gbaud OOK, clearly open eyes are obtained, while for PAM-4 the performance is limited by the non-linear E/O-transfer function of the EAM. However, adding pre-emphasis in the electrical driver or replacing the single EAM with our previously demonstrated optical DAC topology -consisting of two EAMs in parallel with a 90° phase difference between each- could substantially improve these results. Additionally, we discuss the possibility of a four channel transmitter (4 x 208 Gb/s) from a single mode locked laser, amounting to a 832 Gb/s rate based on the current demonstrator.

AB - With next-generation optical interconnects for data centers aiming for 0.8 Tb/s or 1.6 Tb/s, 100 Gbaud capable transmitters from a single-laser source will become indispensable. However, these lane rates would require bandwidths of 70 GHz or more, doubling the bandwidth requirements of the electrical and optical components with respect to the fastest current generation of optical interconnects running at 53 Gbaud PAM-4. In this paper, we propose an integrated 4:1 optical serializer topology to achieve 104 Gbaud NRZ and PAM-4 transmission using only quarter rate components at the transmitter. We show 104 (208) Gbit/s OOK (PAM4) transmission using four GeSi EAMs over 1 km of SMF. For 104 Gbaud OOK, clearly open eyes are obtained, while for PAM-4 the performance is limited by the non-linear E/O-transfer function of the EAM. However, adding pre-emphasis in the electrical driver or replacing the single EAM with our previously demonstrated optical DAC topology -consisting of two EAMs in parallel with a 90° phase difference between each- could substantially improve these results. Additionally, we discuss the possibility of a four channel transmitter (4 x 208 Gb/s) from a single mode locked laser, amounting to a 832 Gb/s rate based on the current demonstrator.

KW - Integrated optics

KW - Optical interconnects

KW - Silicon photonics

KW - Waveguide modulators

U2 - 10.1109/JLT.2019.2897401

DO - 10.1109/JLT.2019.2897401

M3 - Journal article

VL - 37

SP - 1498

EP - 1503

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

SN - 0733-8724

IS - 5

ER -