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Pulsed-ASE-seeded DWDM optical system with interferometric noise suppression.

Sang-Hwa Yoo, Sang-Rok Moon, Myeonggyun Kye

    Optics Express
    |April 11, 2014
    PubMed
    Summary

    This study introduces a 10-Gb/s dense wavelength-division-multiplexing (DWDM) optical system using a fiber-based Mach-Zehnder interferometer (F-MZI) for noise suppression. The F-MZI enhances system capacity and reduces required injection power.

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    Area of Science:

    • Optical Engineering
    • Telecommunications
    • Photonics

    Background:

    • Dense wavelength-division-multiplexing (DWDM) systems are crucial for high-capacity optical networks.
    • Intensity noise in seed-light sources can limit the performance of DWDM systems.
    • Fiber-based Mach-Zehnder interferometers (F-MZIs) offer potential for noise suppression.

    Purpose of the Study:

    • To propose and demonstrate a 10-Gb/s DWDM optical system.
    • To utilize an F-MZI as an intensity noise suppressor for a pulsed-seed-light source.
    • To investigate the system's performance, including required injection power and flexibility.

    Main Methods:

    • Implementation of a 10-Gb/s DWDM optical system.
    • Integration of a pulsed-seed-light source with an F-MZI for noise suppression.
    • Measurement of injection power requirements and investigation of drop fiber length.

    Main Results:

    • Achieved a 10-Gb/s DWDM optical system performance.
    • Demonstrated low required injection power of -18 dBm into a reflective modulator.
    • Showcased the F-MZI's ability to double supported DWDM channels by accommodating polarized seed-light with superior noise characteristics.

    Conclusions:

    • The proposed F-MZI effectively suppresses intensity noise in pulsed-seed-light sources for DWDM systems.
    • The system exhibits flexibility, with an allowable drop fiber length investigated.
    • This approach enhances DWDM system capacity and reduces operational power requirements.