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Implementation of a Reference Interferometer for Nanodetection
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    This summary is machine-generated.

    We developed a low-cost tunable laser using coupled Fabry-Perot cavities. This laser offers a wide tuning range and high side-mode suppression ratio (SMSR) for efficient wavelength selection.

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    Area of Science:

    • Photonics
    • Semiconductor Lasers
    • Optical Engineering

    Background:

    • Tunable lasers are crucial for various applications, including optical communications and spectroscopy.
    • Existing tunable laser technologies often face challenges with cost, complexity, or performance limitations.

    Purpose of the Study:

    • To present a novel, simply processed tunable laser.
    • To achieve a wide tuning range and high side-mode suppression ratio (SMSR) using a cost-effective fabrication process.

    Main Methods:

    • Fabrication of a tunable laser based on two coupled Fabry-Perot cavities.
    • Analytical derivation of complex coupling coefficients from a 3x3 multimode interference (MMI) coupler using coupled mode theory.
    • Integration of a reflective interferometer derived from a Michelson Interferometer for coarse wavelength selection.

    Main Results:

    • Achieved a tuning range of 26 nm, with potential for over 40 nm.
    • Obtained a side-mode suppression ratio (SMSR) greater than 40 dB.
    • Demonstrated fiber-coupled power up to 9 dBm.

    Conclusions:

    • The proposed tunable laser design is simple to process and fabricated using a generic, low-cost method.
    • The optimized coupling element and integrated interferometer enable wide tunability and high SMSR.
    • This technology holds promise for cost-effective tunable laser solutions.