Scalable WDM phase regeneration in a single phase-sensitive amplifier through optical time lenses

Pengyu Guan (), Francesco Da Ros, Mads Lillieholm, Niels-Kristian Kjøller, Hao Hu, Kasper Meldgaard Røge, Michael Galili, Toshio Morioka and Leif Katsuo Oxenløwe ()
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Pengyu Guan: Technical University of Denmark
Francesco Da Ros: Technical University of Denmark
Mads Lillieholm: Technical University of Denmark
Niels-Kristian Kjøller: Technical University of Denmark
Hao Hu: Technical University of Denmark
Kasper Meldgaard Røge: Technical University of Denmark
Michael Galili: Technical University of Denmark
Toshio Morioka: Technical University of Denmark
Leif Katsuo Oxenløwe: Technical University of Denmark

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract Optical data regeneration is attractive, due to its potential to increase transmission reach and data throughput in communication systems, and several interesting proposals have been made. However, efficient and scalable solutions for regeneration of multiple parallel wavelength channels have been elusive, constituting a key challenge, which must be overcome for optical regeneration to have any prospect of being adapted in actual communication systems. Here we report a scalable wavelength-division multiplexing (WDM) regeneration scheme for phase only regeneration, which satisfies the multichannel requirement, using a set of optical time-lens-based Fourier processors combined with a single phase-sensitive amplifier (PSA). We describe the concept theoretically, and experimentally demonstrate simultaneous regeneration of 16 WDM channels with 50-GHz spacing, each carrying 10-Gbit/s DPSK phase-modulated data. The proposed scheme relies on ultrafast broadband optical processing and is inherently scalable in modulation speed and channel number.

Date: 2018
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DOI: 10.1038/s41467-018-03458-8

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