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Updated: Feb 26, 2026

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    Area of Science:

    • Optics and Photonics
    • Quantum Information Science

    Background:

    • Orbital Angular Momentum (OAM) is a fundamental property of light.
    • Generating and controlling OAM states, particularly with high purity, is crucial for advanced optical applications.

    Purpose of the Study:

    • To demonstrate the first-time production of light with orbital angular momentum (OAM) of ±2ℏ per photon.
    • To achieve continuous tunability of OAM states.
    • To explore the creation of non-integer OAM beams.

    Main Methods:

    • Utilizing commercially available polarization-maintaining fiber.
    • Achieving a modal purity of 96% for the generated OAM states.
    • Employing twist measurements to verify and tune the OAM.

    Main Results:

    • Successful generation of light with ±2ℏ OAM per photon.
    • Demonstration of continuous tunability of average OAM between ±2ℏ.
    • Creation of non-integer OAM beams as superpositions of integer OAM states.

    Conclusions:

    • The presented method offers a practical approach for generating tunable OAM light.
    • This technique has potential applications in fields requiring precise control of light's angular momentum.