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Dense WDM transmission at 2  μm enabled by an arrayed waveguide grating.

H Zhang, M Gleeson, N Ye

    Optics Letters
    |July 16, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Researchers demonstrate dense wavelength-division multiplexing (WDM) at 2 μm using advanced modulation and a novel arrayed waveguide grating (AWGr). This breakthrough enables higher data rates in optical communication systems.

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    Area of Science:

    • Optical Communications
    • Photonics
    • Telecommunications Engineering

    Background:

    • Dense wavelength-division multiplexing (WDM) is crucial for increasing optical network capacity.
    • Transmission at 2 μm offers potential advantages but faces component development challenges.

    Purpose of the Study:

    • To demonstrate dense WDM transmission at 2 μm for the first time.
    • To develop and characterize key enabling components for 2 μm WDM systems.

    Main Methods:

    • Utilized advanced modulation formats, specifically 4-ASK Fast-OFDM.
    • Developed a novel arrayed waveguide grating (AWGr) operating at 2 μm.

    Main Results:

    • Achieved dense WDM transmission with 8 channels at 20 Gbit/s each at 2 μm.
    • The developed AWGr exhibited -12.8±1.78 dB excess loss and an 18-dB extinction ratio.
    • Characterized the AWGr's thermal tunability at 0.108 nm/°C.

    Conclusions:

    • Successfully demonstrated the feasibility of dense WDM at 2 μm.
    • The novel AWGr is a key component for advancing 2 μm optical communication systems.
    • This work paves the way for higher-capacity optical networks in the 2 μm wavelength band.