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Updated: Jun 15, 2026

Quasi-light Storage for Optical Data Packets
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Optical bypass switch for fiber-optic data bus systems.

M Nunoshita, Y Nomura

    Applied Optics
    |March 18, 2010
    PubMed
    Summary
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    A novel optical bypass switch for multimode-fiber data buses was developed using rod lenses and mirrors. This mechanically operated component demonstrates low insertion loss and crosstalk, passing rigorous environmental tests.

    Area of Science:

    • Optoelectronics
    • Fiber optics communication
    • Optical switching technology

    Background:

    • Multimode-fiber data bus systems require reliable optical switching components.
    • Existing optical bypass switches may face limitations in performance or durability.

    Purpose of the Study:

    • To develop and characterize a new type of optical bypass switch for multimode-fiber data bus systems.
    • To evaluate the performance and reliability of the novel switch under various conditions.

    Main Methods:

    • Construction of a four-port optical bypass switch using graded-index rod lenses and movable mirrors.
    • Mechanical operation actuated by an electromagnet and a spring mechanism.
    • Performance evaluation including insertion loss and crosstalk measurements.

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  • Environmental testing encompassing endurance, temperature, humidity, and vibration.

    • Main Results:

    • The developed optical bypass switch exhibits a low insertion loss of 1.2 dB.
    • Achieved crosstalk levels are below -45 dB, indicating high signal isolation.
    • The switch successfully passed endurance, temperature, humidity, and vibration tests, demonstrating robustness.

    Conclusions:

    • The new optical bypass switch is a viable component for multimode-fiber data bus systems.
    • Its low insertion loss, minimal crosstalk, and proven environmental resilience make it suitable for demanding applications.
    • Further integration and long-term field performance studies are warranted.