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Related Experiment Video

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Widely tunable semiconductor lasers with three interferometric arms.

Guan-Lin Su, Ming C Wu

    Optics Express
    |October 19, 2017
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new tunable semiconductor laser using a multi-mode interference coupler. This design achieves wide tuning and high side-mode suppression, crucial for optical communications.

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    Area of Science:

    • Photonics and Optical Engineering
    • Semiconductor Device Physics

    Background:

    • Tunable semiconductor lasers are essential for optical communication systems.
    • Existing designs face limitations in tuning range and spectral purity.

    Purpose of the Study:

    • To introduce a novel three-branch tunable semiconductor laser.
    • To provide a theoretical framework for interferometric lasers.
    • To establish design rules for C-band dense-wavelength division multiplexing (DWDM) compatibility.

    Main Methods:

    • Theoretical analysis of a three-branch laser architecture.
    • Utilizing a self-imaging, lossless multi-mode interference (MMI) coupler.
    • Developing design rules for specific wavelength grids.

    Main Results:

    • The three-branch laser demonstrates a wide tuning range.
    • High side-mode suppression ratios (SMSRs) were achieved.
    • A low threshold modal gain for the lasing mode was observed.

    Conclusions:

    • The proposed laser design offers significant advantages for tunable laser applications.
    • The theoretical framework is broadly applicable to interferometric laser systems.
    • The design rules facilitate integration into existing DWDM infrastructure.