WDM orthogonal subcarrier multiplexing based on mode-locked lasers

Fernando A. Gutiérrez, Eamonn P. Martin, Philip Perry, Andrew D. Ellis, Aravind Anthur, Vivek Panapakkam, Quentin Gaimard, Kamel Merghem, Francois Lelarge, Abderrahim Ramdane, Liam P. Barry

Research output: Contribution to journalArticlepeer-review


The (de)modulation of broadband orthogonal subchannels relying on all-analogue signal processing potentially achieves high-capacity orthogonal subcarrier multiplexing (OSCM) electro-optical transceivers with low power consumption and latency. Overall transmission rates can be multiplied by employing wavelength division multiplexing (WDM) technology. Mode-locked lasers (MLL) are relevant optical frequency combs, as they produce a high number of comb tones while presenting a small footprint and low power consumption. Unlike baseband transmission, the use of high-frequency subchannels in OSCM systems overcomes the high relative intensity noise that MLL comb tones present at low frequencies. This paper reports a direct-detection real-time all-analogue WDM/OSCM experiment that emulates a 432 Gbit/s (20 × 21.6 Gbit/s) electro-optical transceiver. The 20 optical carriers were generated by a state-of-the-art quantum-dash MLL. The net data rate after considering forward error correction overheads is still higher than 400 Gbit/s. This is the highest capacity achieved in real-time broadband all-analogue WDM/OSCM links to date.

Original languageEnglish
Pages (from-to)2981-2987
Number of pages7
JournalJournal of Lightwave Technology
Issue number14
Early online date19 Jun 2017
Publication statusPublished - 15 Jul 2017


  • electro-optical transceiver
  • filter bank multicarrier (FBMC)
  • mode locked laser (MLL)
  • subcarrier multiplexing (SCM)


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