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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Mode division multiplexed optical transmission enabled by all-fiber mode multiplexer.

Sun Hyok Chang, Hwan Seok Chung, Nicolas K Fontaine

    Optics Express
    |July 1, 2014
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    This study demonstrates a novel all-fiber mode multiplexer for optical transmission, successfully transmitting three spatial modes at 120 Gb/s over 15 km using advanced digital signal processing.

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    Area of Science:

    • Optical Communications
    • Photonics
    • Signal Processing

    Background:

    • Mode division multiplexing (MDM) offers increased data capacity in optical fibers.
    • Efficient and compact mode multiplexers are crucial for practical MDM systems.

    Purpose of the Study:

    • To investigate an all-fiber mode multiplexer for simultaneous multiplexing/demultiplexing of multiple spatial modes.
    • To demonstrate high-speed data transmission using the proposed mode multiplexer.

    Main Methods:

    • Development of an all-fiber mode multiplexer using consecutive mode selective couplers.
    • Transmission of 120 Gb/s PDM-QPSK signals over 15 km of four-mode fiber.
    • Utilizing 6x6 Multiple-Input Multiple-Output (MIMO) digital signal processing.

    Main Results:

    • Simultaneous multiplexing and demultiplexing of LP01, LP11, LP21, and LP02 modes were achieved.
    • Successful high-speed data transmission was demonstrated, validating the device's performance.
    • The system achieved reliable transmission over a significant fiber length.

    Conclusions:

    • The proposed all-fiber mode multiplexer is a viable component for future high-capacity optical networks.
    • MDM combined with advanced signal processing enables enhanced data rates.
    • This technology paves the way for next-generation optical communication systems.