Frequency stabilization and channel identification for dense wavelength-division-multiplexing (WDM) fiber optic transmission systems

Mohsen Kavehrad, Quan Jiang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations

    Abstract

    A dense WDM transmission system is promising for high-capacity fiber optic links. In a dense WDM system with a moderate number of channels, the total wavelength range can be within the discrete/continuous tuning range of multisection DBR lasers. Therefore, a laser array consisting of laser diodes with the same nominal wavelength can be used. In this paper, we propose a new frequency stabilization and channel identification technique for dense WDM transmission systems. The laser diodes on the transmitter side are frequency modulated by sinusoidal signals that are used as pilot tones for channel identification on the receiver side. Depending on the difference between the optical filter's central frequency and the received optical signal frequency, the filter output can be the sinusoidal signal itself or its second harmonic. We use a nonlinear electronic circuit and a phase-locked loop to regenerate the sinusoidal signal. This provides a reliable source for channel identification. Meanwhile, there is no need to modulate the optical filter central-frequency to lock it to the received signal since the received signal is already frequency-dithered and the sinusoidal signal is recovered on the receiver side. This eliminates the power penalty due to frequency-dither of the optical filter.

    Original languageEnglish (US)
    Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
    PublisherSociety of Photo-Optical Instrumentation Engineers
    Pages245-248
    Number of pages4
    ISBN (Print)0819417254, 9780819417251
    DOIs
    StatePublished - 1995
    EventLaser Frequency Stabilization and Noise Reduction - San Jose, CA, USA
    Duration: Feb 9 1995Feb 10 1995

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume2378
    ISSN (Print)0277-786X

    Other

    OtherLaser Frequency Stabilization and Noise Reduction
    CitySan Jose, CA, USA
    Period2/9/952/10/95

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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  • Cite this

    Kavehrad, M., & Jiang, Q. (1995). Frequency stabilization and channel identification for dense wavelength-division-multiplexing (WDM) fiber optic transmission systems. In Proceedings of SPIE - The International Society for Optical Engineering (pp. 245-248). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 2378). Society of Photo-Optical Instrumentation Engineers. https://doi.org/10.1117/12.208242