WDM Orthogonal Subcarrier Multiplexing Based on Mode-Locked Lasers

Fernando A. Gutierrez, 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 journalArticle


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
Article number7932061
Pages (from-to)2981-2987
Number of pages7
JournalJournal of Lightwave Technology
Issue number14
Early online date19 May 2017
Publication statusPublished - 15 Jul 2017



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

Cite this

Gutierrez, F. A., Martin, E. P., Perry, P., Ellis, A. D., Anthur, A., Panapakkam, V., ... Barry, L. P. (2017). WDM Orthogonal Subcarrier Multiplexing Based on Mode-Locked Lasers. Journal of Lightwave Technology, 35(14), 2981-2987. [7932061]. https://doi.org/10.1109/JLT.2017.2706725