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A 10-Gbit/s EML link using detuned narrowband optical filtering.

P Ebrahimi, R Jones, Y Wang

    Optics Express
    |June 24, 2009
    PubMed
    Summary

    Asymmetric narrowband optical filtering improves long-distance optical communication by compensating for fiber chromatic dispersion. This technique enhances performance in links using electro-absorption modulated lasers (EMLs).

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    Area of Science:

    • Optical Communications
    • Photonics
    • Laser Technology

    Background:

    • Optical communication systems face limitations due to fiber chromatic dispersion and laser chirp.
    • Electro-absorption modulated lasers (EMLs) are crucial components in high-speed optical links.
    • Asymmetric narrowband optical filtering offers potential for dispersion compensation.

    Purpose of the Study:

    • To investigate the impact of asymmetric narrowband optical filtering on a 10-Gbit/s optical communication link.
    • To analyze the influence of EML chirp on link performance.
    • To determine optimal filter bandwidth and wavelength detuning for enhanced transmission distances.

    Main Methods:

    • Utilizing integrated electro-absorption modulated lasers (EMLs) in a 10-Gbit/s optical link.

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  • Experimentally evaluating the effects of varying filter bandwidth and wavelength detuning.
  • Analyzing the interaction between filter phase response, spectral narrowing, and EML transient chirp.

    • Main Results:

    • Asymmetric narrowband optical filtering effectively compensates for fiber chromatic dispersion.
    • Optimal filter parameters were identified to mitigate EML chirp effects.
    • An 8.75-GHz filter extended transmission distance by 40 km (from 65 km to 105 km) over standard single-mode fiber.

    Conclusions:

    • Asymmetric narrowband optical filtering is a viable technique for enhancing transmission distance in optical communication systems.
    • The interaction between filter properties and EML chirp is key to overcoming dispersion limitations.
    • This method offers a practical solution for extending the reach of 10-Gbit/s optical links.