Demonstration of CoWDM using DPSK modulator array with injection-locked lasers

Selwan K. Ibrahim, Andrew D. Ellis, Fatima C. Garcia Gunning, F.H. Peters

Research output: Contribution to journalArticlepeer-review


A practical implementation of coherent wavelength division multiplexing (CoWDM) is demonstrated for the first time using injection-locked lasers and a DPSK modulator array. For a 31.99 Gbit/s system (three subcarriers at 10.664 Gbit/s) the null-to-null spectral bandwidth was only 42.656 GHz and the average receiver sensitivity measured was -33.5 dBm when all subcarrier phases were optimised.
Original languageEnglish
Pages (from-to)150-152
Number of pages3
JournalElectronics letters
Issue number2
Publication statusPublished - 21 Jan 2010

Bibliographical note

This paper is a postprint of a paper submitted to and accepted for publication in Electronics Letters and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library.


  • optical communication equipment
  • optical modulation
  • wavelength division multiplexing
  • optical arrays
  • differential phase shift keying
  • high-speed optical techniques
  • laser mode locking
  • distributed feedback lasers


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