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106.25 Gbaud On-Off Keying and Pulse Amplitude Modulation Links Supporting Next Generation Ethernet on Single Lambda
Riga Technical University, Latvia.
Riga Technical University, Latvia.
Keysight Technologies GmbH, Germany.
Keysight Technologies GmbH, Germany.
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2023 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213Article in journal (Refereed) Epub ahead of print
Abstract [en]

Development of Data Center based computing technology require energy efficient high-speed transmission links. This leads to optical amplification-free intensity modulation and direct detection (IM/DD) systems with low complexity equalization compliant with IEEE standardized electrical interfaces. Switching from on-off keying to multi-level pulse amplitude modulation would allow to reduce lane count for next generation Ethernet interfaces. We characterize 106.25 Gbaud on-off keying, 4-level and 6-level pulse amplitude modulation links using two integrated transmitters: O-band directly modulated laser and C-band externally modulated laser. Simple feed forward or decision feedback equalizer is used. We demonstrate 106.25 Gbaud on-off keying links operating without forward error correction for both transmitters. We also show 106.25 Gbaud 4-level and 6-level pulse amplitude modulation links with performance below 6.25% overhead hard-decision forward error threshold of 4.5×10-3. Furthermore, for EML-based transmitter we achieve 106.25 Gbaud 4-level pulse amplitude modulation performance below KP-FEC threshold of 2.2×10-4. That shows that we can use optics to support (2x)100 Gbps Ethernet on single lambda at expense of simple forward error correction.

Place, publisher, year, edition, pages
2023.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:ri:diva-70085DOI: 10.1109/JLT.2023.3328774OAI: oai:DiVA.org:ri-70085DiVA, id: diva2:1828748
Note

This work was supported by the Swedish Research Council (VR) projects 2019-05197 and BRAIN (2022-04798), The strategic innovation program Smarter Electronic Systems - a joint venture by Vinnova, Formas and the Swedish Energy Agency A-FRONTAHUL project (2023-00659), the H2020 ICT TWILIGHT Project (No. 781471), the ERDF-funded RINGO project (No. 1.1.1.1/21/A/052), the RTU Science Support Fund, the National Natural Science Foundation of China (U2006217, 61775015), the China Scholarship Council (202107090113), and the National Key Research and Development Program of China (2018YFB1801500). (Corresponding authors: X. Pang and O. Ozolins.)

Available from: 2024-01-17 Created: 2024-01-17 Last updated: 2024-03-04Bibliographically approved

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Fan, YuchuanPang, XiaodanOzolins, Oskars

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