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Ring focus reflector design for topological charge multiplexing based on a perfect vortex beam.

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    Summary

    A novel ring focus reflector efficiently transmits perfect vortex (PV) beams with multiple topological charges. This technology enables simultaneous transmission of different PV beam orders, paving the way for advanced optical multiplexing applications.

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    Area of Science:

    • Optics and Photonics
    • Beam Shaping and Propagation

    Background:

    • Perfect vortex (PV) beams possess unique helical phase structures.
    • Efficient generation and manipulation of PV beams are crucial for optical applications.

    Purpose of the Study:

    • To propose and investigate a ring focus reflector for transmitting perfect vortex (PV) beams.
    • To analyze the transmission characteristics of PV beams with varying topological charges.

    Main Methods:

    • The study involves designing a ring focus reflector with parameters determined by fitting a structural formula.
    • Transmission characteristics were analyzed using diffraction formulas and ray tracing.
    • Simulations and calculations were performed for PV beams with different topological charges.

    Main Results:

    • The proposed reflector successfully transmits PV beams with different topological charges.
    • PV beams of various orders were observed to transmit with small spot sizes simultaneously.
    • Calculated transmission trajectories aligned with ray tracing results, validating the diffraction model.
    • High transmission efficiency was achieved for beams with diverse topological charges.

    Conclusions:

    • The ring focus reflector is an effective device for transmitting PV beams.
    • The reflector facilitates the simultaneous transmission of PV beams with multiple topological charges.
    • This research supports the advancement of PV beam multiplexing technologies.