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Mid-infrared wavelength conversion from As2Se3 microwires.

Lizhu Li, Nurmemet Abdukerim, Martin Rochette

    Optics Letters
    |February 2, 2017
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    Researchers achieved tunable mid-infrared wavelength conversion using chalcogenide glass (As2Se3) microwires. This all-fiber method enabled broad tuning ranges for generated idlers and parametric sidebands, setting new records for soft glass materials.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Nonlinear Optics

    Background:

    • Mid-infrared (mid-IR) light sources are crucial for spectroscopy and sensing.
    • Achieving widely tunable and efficient wavelength conversion in the mid-IR remains a challenge.
    • All-fiber systems offer advantages in stability and compactness for optical applications.

    Purpose of the Study:

    • To demonstrate all-fiber, widely tunable mid-infrared wavelength conversion.
    • To investigate the use of Arsenic Selenide (As2Se3) microwires for nonlinear optical processes.
    • To achieve significant frequency conversion bandwidths in soft glass materials.

    Main Methods:

    • Fabrication of Arsenic Selenide (As2Se3) microwires.
    • Utilizing four-wave mixing in a short (0.5 cm) As2Se3 microwire to generate tunable idler wavelengths.
    • Employing modulation instability in a longer (10 cm) As2Se3 microwire to generate tunable parametric sidebands.
    • Characterizing the generated wavelengths and conversion efficiencies.

    Main Results:

    • Achieved tunable mid-infrared idler generation from 2.351 to over 2.500 μm via four-wave mixing.
    • Generated tunable parametric sidebands with frequency conversion up to 49.3 THz using modulation instability.
    • Demonstrated the largest reported parametric frequency conversion bandwidth in soft glass materials.

    Conclusions:

    • As2Se3 microwires are effective platforms for all-fiber, tunable mid-infrared wavelength conversion.
    • The demonstrated techniques offer a pathway to versatile mid-IR light generation.
    • These results push the boundaries of nonlinear frequency conversion in soft glass photonic systems.