Journal article
Single-source chip-based frequency comb enabling extreme parallel data transmission
Department of Photonics Engineering, Technical University of Denmark1
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark2
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark3
Nanophotonic Devices, Department of Photonics Engineering, Technical University of Denmark4
Technical University of Denmark5
Fujikura Ltd.6
The Internet today transmits hundreds of terabits per second, consumes 9% of all electricity worldwide and grows by 20-30% per year(1,2). To support capacity demand, massively parallel communication links are installed, not scaling favourably concerning energy consumption. A single frequency comb source may substitute many parallel lasers and improve system energy-efficiency(3,4).
We present a frequency comb realized by a non-resonant aluminium-gallium-arsenide-oninsulator (AlGaAsOI) nanowaveguide with 66% pump-tocomb conversion efficiency, which is significantly higher than state-of-the-art resonant comb sources. This enables unprecedented high data-rate transmission for chip-based sources, demonstrated using a single-mode 30-core fibre.
We show that our frequency comb can carry 661 Tbit s(-1) of data, equivalent to more than the total Internet traffic today. The comb is obtained by seeding the AlGaAsOI chip with 10-GHz picosecond pulses at a low pump power (85 mW), and this scheme is robust to temperature changes, is energy efficient and facilitates future integration with on-chip lasers or amplifiers(5,6).
Language: | English |
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Year: | 2018 |
Pages: | 469-74 |
ISSN: | 17494893 and 17494885 |
Types: | Journal article |
DOI: | 10.1038/s41566-018-0205-5 |
ORCIDs: | Hu, Hao , Da Ros, Francesco , Pu, Minhao , Ingerslev, Kasper , Porto da Silva, Edson , Ottaviano, Luisa , Semenova, Elizaveta , Guan, Pengyu , Zibar, Darko , Galili, Michael , Yvind, Kresten , Morioka, Toshio and Oxenløwe, Leif Katsuo |