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140/180/204-Gbaud OOK Transceiver for Inter- and Intra-Data Center Connectivity
Nokia Bell Labs, France.
Nokia Bell Labs, France.
Nokia Bell Labs, France.
RISE - Research Institutes of Sweden, ICT, Acreo.ORCID iD: 0000-0001-9839-7488
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2019 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 37, no 1, p. 178-187, article id 8500133Article in journal (Refereed) Published
Abstract [en]

We report on an on-off keying intensity-modulation and direct-detection C-band optical transceiver capable of addressing all datacenter interconnect environments at well-beyond 100Gbaud. For this, the transmitter makes use of two key InP technologies: a 2:1 double heterojunction bipolar transistor selector multiplexer and a monolithically integrated distributed-feedback laser traveling-wave electro-absorption modulator, both exceeding 100-GHz of 3-dB analog bandwidth. A pre-amplified 110-GHz PIN photodiode prior to a 100-GHz analog-to-digital converter complete the ultra-high bandwidth transceiver module; the device under study. In the experimental work, which discriminates between intra- and inter-data center scenarios (dispersion unmanaged 120, 560, 960m; and dispersion-managed 10, and 80km of standard singlemode fiber), we evaluate the bit-error rate evolution against the received optical power at 140, 180, and 204Gbaud on-off keying for different equalization configurations (adaptive linear filter with and without the help of short-memory sequence estimation) and forward error correction schemes (hard-decision codes with 7% and 20% overhead); drawing conclusions from the observed system-level limitations of the respective environments at this ultra-high baudrate, as well as from the operation margins and sensitivity metrics. From the demonstration, we highlight three results: successful operation with >6-dB sensitivity margin below the 7% error-correction at 140Gbaud over the entire 100m-80km range with only linear feed-forward equalization. Then the transmission of a 180Gbaud on-off-keying carrier over 80km considering 20% error-correction overhead. And finally, 10-km communication at 204Gbaud on-off keying with up to 6dB sensitivity margin, and regular 7%-overhead error-correction.

Place, publisher, year, edition, pages
2019. Vol. 37, no 1, p. 178-187, article id 8500133
Keywords [en]
Modulation, Transceivers, Indium phosphide, III-V semiconductor materials, Bandwidth, Optical fiber dispersion, Distributed feedback devices, Data center interconnects, electro-absorption modulation, InP, integrated circuits, optical fiber communication, very high-speed modulation
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-37642DOI: 10.1109/JLT.2018.2876732OAI: oai:DiVA.org:ri-37642DiVA, id: diva2:1283552
Available from: 2019-01-29 Created: 2019-01-29 Last updated: 2019-06-28Bibliographically approved

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Ozolins, OskarsUdalcovs, Aleksejs

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