Spectral density enhancement using coherent WDM

Andrew D. Ellis, Fatima C. Garcia Gunning

    Research output: Contribution to journalArticlepeer-review


    It is shown by numerical simulations that a significant increase in the spectral density of a 40-Gb/s wavelength-division-multiplexing (WDM) system can be obtained by controlling the phase of adjacent WDM channels. These simulations are confirmed experimentally at 40 Gb/s using a coherent,comb source. This technique allows the spectral density of a nonreturn-to-zero WDM system to be increased from 0.4 to 1 b/s/Hz in a single polarization. Optical filter optimization is required to minimize power crosstalk, and appropriate strategies are discussed in this letter. Index Terms-Filtering, optical communication terminals, phase control, wavelength-division multiplexing (WDM).
    Original languageEnglish
    Pages (from-to)504-506
    Number of pages3
    JournalIEEE Photonics Technology Letters
    Issue number2
    Publication statusPublished - Feb 2005


    • spectral density
    • wavelength-division-multiplexing
    • single polarization


    Dive into the research topics of 'Spectral density enhancement using coherent WDM'. Together they form a unique fingerprint.

    Cite this