Waveguide arrays and spectral filtering for multi-frequency mode-locked pulse sources

Edward Farnum, Brandon G. Bale, J. Nathan Kutz

    Research output: Chapter in Book/Published conference outputConference publication


    Current optical fiber-communication networks increasingly rely on wavelength-division multiplexing (WDM) technologies in conjunction with optical time-division multiplexing (OTDM) of individual WDM channels. The combination of high-repetition-rate data streams with a large number of WDM channels has pushed transmission rates to nearly 1 TB/s, creating a demand for all-optical transmission sources that can generate pico-second modelocked pulses at various wavelengths. Through nonlinear mode-coupling in a wave-guide array and a periodically applied multi-notch frequency filter, robust multi-frequency mode-locking can be achieved in a laser cavity in both the normal and anomalous dispersion regimes. We develop a theoretical description of this multiplewavelength mode-locking, and characterize the mode-locked solutions and their stability for an arbitrary number of frequency channels. The theoretical investigations demonstrate that the stability of the mode-locked pulse solutions of multiple frequency channels depends on the degree of inhomogenity in gain saturation. Specifically, only a small amount of inhomogeneous gain-broadening is needed for multi-frequency operation in the laser. In this presentation, the conditions on the system parameters necessary for generating stable mode-locking is explored for arbitrary number of frequency channels. The model suggests a promising source for multi-frequency photonic applications.

    Original languageEnglish
    Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
    ISBN (Print)9780819476685
    Publication statusPublished - 20 Nov 2009
    EventPhotonics North 2009 - Laval, QC, United Kingdom
    Duration: 24 May 200927 May 2009


    ConferencePhotonics North 2009
    Country/TerritoryUnited Kingdom
    CityLaval, QC

    Bibliographical note

    Copyright 2009 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


    • Mode-locked lasers
    • Waveguide arrays
    • Wavelength-division multiplexing


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