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Fiber-optic tunable loop mirror using Berry's geometric phase.

P Senthilkumaran, G Thursby, B Culshaw

    Optics Letters
    |December 8, 2007
    PubMed
    Summary
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    A novel fiber-optic loop mirror offers tunable reflectivity using only geometry, independent of polarization and wavelength. This controllable device enables efficient energy transfer between optical channels.

    Area of Science:

    • Optics and Photonics
    • Fiber Optic Technology

    Background:

    • Fiber-optic loop mirrors are crucial optical devices.
    • Achieving tunable reflectivity typically requires complex components.

    Purpose of the Study:

    • To present a method for constructing a fiber-optic loop mirror with tunable reflectivity.
    • To demonstrate polarization and wavelength independence of the tunability.

    Main Methods:

    • Utilizing a fixed-ratio directional coupler.
    • Implementing a fiber-tuning element whose geometry controls reflectivity.
    • Experimental demonstration and investigation of tunable reflectivity.

    Main Results:

    • Successfully constructed a fiber-optic loop mirror with tunable reflectivity.

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  • Tunability was confirmed to be independent of polarization and wavelength.
  • Demonstrated controllable energy transfer between optical channels.

    • Conclusions:

    • The proposed method provides a simple and effective way to achieve tunable reflectivity in fiber-optic loop mirrors.
    • The geometry-dependent tunability offers a robust solution for optical energy transfer applications.