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MOSFET: Enhancement Mode01:22

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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All-optically modulated nonvolatile optical switching based on a graded-index multimode fiber.

Yu Zhang, Shuai Liu, Jiming Chen

    Optics Express
    |October 19, 2022
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a novel multilevel optical switch using phase-change material Germanium-Antimony-Telluride (GST) integrated with optical fiber. This nonvolatile, all-fiber device offers 11 distinct states for advanced optical communication networks.

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    Area of Science:

    • Photonics
    • Materials Science
    • Optical Communications

    Background:

    • Photonic switches are crucial for dynamic reconfiguration in optical communication networks.
    • Integrating optical switching devices with optical fiber enables practical signal transmission and processing.
    • Phase-change materials offer unique properties for optical switching applications.

    Purpose of the Study:

    • To demonstrate a multilevel optical switch using Germanium-Antimony-Telluride (GST) integrated on a graded-index multimode fiber.
    • To leverage the distinct optical properties of GST's amorphous and crystalline states for switching.
    • To develop a nonvolatile, all-fiber integrated photonic switch.

    Main Methods:

    • Integration of GST onto graded-index multimode fiber end facets via magnetron sputtering.
    • Exploitation of the significant difference in extinction coefficient between crystalline and amorphous GST states.
    • Utilizing a pulsing scheme with a 1550 nm pump laser to control optical propagation states.

    Main Results:

    • Demonstration of an 11-level nonvolatile optical switch with reliable and repeatable states.
    • Switching speeds on the order of hundreds of nanoseconds.
    • Successful operation across a broadband range of 1525 nm to 1610 nm.

    Conclusions:

    • The developed GST-based multilevel optical switch is feasible for optical fiber communication systems.
    • The all-fiber integrated device is compatible with existing fiber terminal equipment.
    • This technology shows promise for future multilevel photonic switches and memory devices.