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Optical waveguide 2 x 2 matrix switch using dielectric chip motion.

H Terui, M Kobayashi, J Noda

    Applied Optics
    |April 15, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study explores optical waveguide switches for matrix switching. A novel 2x2 matrix switch utilizing total internal reflection demonstrates efficient light beam switching with low insertion loss and crosstalk.

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    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics
    • Switching Technology

    Background:

    • Total internal reflection (TIR) is a fundamental optical phenomenon.
    • Optical waveguide switches are crucial components in optical communication networks.
    • Matrix switches enable complex signal routing in optical systems.

    Purpose of the Study:

    • To investigate the angular characteristics of light in a total internal reflection (TIR) optical waveguide switch.
    • To design and fabricate a nonblocking 2x2 matrix switch based on TIR principles.
    • To evaluate the performance of the fabricated optical switch in terms of insertion loss, crosstalk, and switching time.

    Main Methods:

    • Analysis of input and output light angles in a TIR optical waveguide switch.
    • Experimental investigation of light switching using a dielectric chip in a low-index channel.
    • Fabrication of a 2x2 matrix switch driven by piezoelectric transducers (PZT) bimorphs.
    • Measurement of insertion loss, crosstalk, and switching time for the TE(0) mode at 0.633-micrometer wavelength.

    Main Results:

    • Output angle is dependent on channel width, chip contact width, chip position, and input angle.
    • A single switch experiment showed output angles exceeding the TIR critical angle due to narrow chip contact width.
    • The fabricated nonblocking 2x2 matrix switch achieved insertion losses of 2.9-6.0 dB.
    • Crosstalk values ranged from 10.8-28.1 dB, with a switching time of 6 milliseconds.

    Conclusions:

    • The angular properties of TIR in optical waveguide switches can be exploited for matrix switch construction.
    • The developed 2x2 matrix switch demonstrates effective light beam switching with acceptable performance metrics.
    • This research contributes to the advancement of nonblocking optical matrix switches for practical applications.