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Silica Microsphere WGMR-Based Kerr-OFC Light Source and Its Application for High-Speed IM/DD Short-Reach Optical Interconnects
AFFOC Solutions Ltd, Latvia; Riga Technical University, Latvia.
University of Latvia, Latvia.
RISE Research Institutes of Sweden, Digital Systems, Industrial Systems. Riga Technical University, Latvia; KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0001-9839-7488
Institute of Applied Physics of the Russian Academy of Sciences, Russia.
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2022 (English)In: Applied Sciences, E-ISSN 2076-3417, Vol. 12, no 9, article id 4722Article in journal (Refereed) Published
Abstract [en]

Kerr optical frequency combs (OFCs) based on silica microsphere whispering gallery mode resonator (WGMR) have various applications where they are used as a light source. For telecommunication purposes, WGMR-based Kerr-OFC comb generators can be physically realized using silica microsphere resonators and can be used to replace multiple laser arrays. In such a realization, these novel light sources have the potential to demonstrate an attractive solution for intradatacenter interconnects (DCI). In this paper, we show an experimental demonstration of a silica microsphere WGMR-based Kerr OFC light source where newly generated 400 GHz spaced carriers together with powerful linear equalization techniques, such as a linear symbol-spaced adaptive decision-feedback equalizer (DFE) with feed-forward (FF) and feedback (FB) taps, provide an alternative to individual lasers ensuring low-cost and low-complexity IM/DD scheme for the transmission of NRZ-OOK modulated signals at data rates up to 50 Gbps/λ over 2 km SMF link. Finally, we demonstrate a record 50 Gbps per λ transmission of NRZ-OOK modulated signals with a novel silica microsphere WGMR-based Kerr-OFC as a light source operating in the optical C-band, surpassing the previously demonstrated data rate record by five times. © 2022 by the authors. 

Place, publisher, year, edition, pages
MDPI , 2022. Vol. 12, no 9, article id 4722
Keywords [en]
equalization, intra-datacenter interconnects (DCI), Kerr optical frequency combs (OFC), silica microsphere
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:ri:diva-60698DOI: 10.3390/app12094722Scopus ID: 2-s2.0-85130191712OAI: oai:DiVA.org:ri-60698DiVA, id: diva2:1703552
Note

Funding details: W1259-N27; Funding details: Austrian Science Fund, FWF; Funding details: Ministry of Education and Science of the Russian Federation, Minobrnauka, 075-15-2021-633; Funding details: European Social Fund, ESF, 8.2.2.0/20/I/008; Funding details: Russian Science Foundation, RSF, 20-72-10188; Funding details: European Regional Development Fund, ERDF, 1.1.1.1/18/A/155; Funding text 1: Acknowledgments: This research was funded by the European Regional Development Fund project No. 1.1.1.1/18/A/155 “Development of optical frequency comb generator based on a whispering gallery mode microresonator and its applications in telecommunications”. The taper fiber preparation was supported by the European Social Fund within project number No. 8.2.2.0/20/I/008 and by the the Austrian Science Fund FWF within the DK-ALM W1259-N27. The development of the program for the optical fusion splicer was funded by the Mega-grant of the Ministry of Science and Higher Education of the Russian Federation, Contract No. 075-15-2021-633. The fabrication of test samples of microspheres was funded by the Russian Science Foundation, Grant No. 20-72-10188.; Funding text 2: Funding: This research was funded by European Regional Development Fund (1.1.1.1/18/A/155); Ministry of Science and Higher Education of the Russian Federation (075-15-2021-633); Russian Science Foundation (20-72-10188).; Funding text 3: Communication Technologies Research Center, Riga Technical University (RTU) acknowledges support from RTU Science Support Fund.

Available from: 2022-10-13 Created: 2022-10-13 Last updated: 2024-03-11Bibliographically approved

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Ozolins, OskarsPang, Xiaodan

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