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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Six mode selective fiber optic spatial multiplexer.

A M Velazquez-Benitez, J C Alvarado, G Lopez-Galmiche

    Optics Letters
    |April 15, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Low-loss all-fiber photonic lanterns (PL) were developed to excite six fiber modes in multimode fibers. These spatial mode multiplexers offer high mode purity and low insertion loss, enabling advanced optical communication systems.

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    Area of Science:

    • Optical Engineering
    • Photonics
    • Fiber Optics

    Background:

    • Photonic lanterns (PLs) are crucial for mode multiplexing in optical communications.
    • Efficiently exciting multiple fiber modes with low loss is essential for increasing data capacity.

    Purpose of the Study:

    • To demonstrate low-loss all-fiber photonic lantern mode multiplexers (MUXs).
    • To selectively excite the first six fiber modes (LP01, LP11a, LP11b, LP21a, LP21b, and LP02) in multimode fibers.

    Main Methods:

    • Fabrication using a combination of six step-index or six graded-index fibers.
    • Utilizing four different core sizes for fiber components.
    • Employing adiabatic tapered transitions in the photonic lantern design.

    Main Results:

    • Achieved low insertion losses ranging from 0.2-0.3 dB.
    • Attained high mode purities exceeding 9 dB.
    • Demonstrated that graded-index fibers ease length requirements for adiabatic transitions.

    Conclusions:

    • Successfully fabricated low-loss photonic lantern mode multiplexers.
    • Graded-index fibers offer advantages for PL design, potentially enabling scalability.
    • The demonstrated technology supports advanced optical communication systems requiring multi-mode transmission.