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OAM states generation/detection based on the multimode interference effect in a ring core fiber.

Junhe Zhou

    Optics Express
    |May 14, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new method for generating and detecting orbital angular momentum (OAM) states using multimode interference in ring core fibers, enabling novel OAM multiplexing applications.

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    Area of Science:

    • Optics and Photonics
    • Fiber Optics Communications
    • Quantum Information

    Background:

    • Orbital angular momentum (OAM) offers a new degree of freedom for optical communications.
    • Current methods for OAM generation/detection can be complex and costly.
    • Ring core fibers provide unique light-guiding properties.

    Purpose of the Study:

    • To propose and theoretically analyze a novel method for generating and detecting OAM states.
    • To demonstrate the feasibility of using multimode interference (MMI) in ring core fibers for OAM manipulation.
    • To realize a compact and efficient OAM multiplexer/de-multiplexer (MUX/DEMUX).

    Main Methods:

    • Developing a comprehensive theory for the MMI process within ring core fibers.
    • Utilizing a fixed phase shifter array to adjust output images.
    • Simulating the conversion of input images into multiple output images via MMI.

    Main Results:

    • The MMI process in ring core fibers generates multiple equally spaced duplicated output images.
    • Phase adjustment of these images stimulates OAM states in the fiber or free space.
    • A functional OAM MUX/DEMUX is theoretically realized using ring core fiber and phase shifters.

    Conclusions:

    • MMI in ring core fibers is an effective mechanism for OAM state generation and detection.
    • This approach offers a novel and potentially simpler way to implement OAM MUX/DEMUX devices.
    • The proposed method has significant implications for advanced optical communication systems.