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Integrated surface acoustic wave deflector and optical disk tracking experiment: development.

T Shimano, K Muraoka, A Arimoto

    Applied Optics
    |August 25, 2010
    PubMed
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    This study introduces an integrated surface acoustic wave deflector to enhance optical disk access times. The new deflector enables experimental optical disk tracking, improving read-only disk performance.

    Area of Science:

    • Photonics and Waveguide Optics
    • Acousto-Optics
    • Materials Science (Titanium-doped Lithium Niobate)

    Background:

    • Optical disk drives require precise and rapid head positioning for efficient data access.
    • Existing deflection technologies face limitations in speed and integration complexity.
    • Titanium-doped Lithium Niobate (Ti:LiNbO3) offers excellent electro-optic and waveguide properties.

    Purpose of the Study:

    • To develop an integrated optical deflector for faster optical disk access times.
    • To demonstrate experimental optical disk tracking using the novel deflector.
    • To detail the fabrication processes for key integrated optical components.

    Main Methods:

    • Integration of a surface acoustic wave (SAW) deflector with an end-coupled laser diode, gradient-index lens, half-wave plate, and geodesic waveguide lens.

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  • Fabrication of a Ti:LiNbO3 waveguide device.
  • Experimental demonstration of optical disk tracking on a read-only disk.

    • Main Results:

    • Successful integration of a SAW deflector with multiple optical elements on a Ti:LiNbO3 waveguide.
    • Experimental achievement of optical disk tracking using the developed integrated device.
    • Detailed description of geodesic lens fabrication, including polishing and waveguide fabrication techniques.

    Conclusions:

    • The integrated SAW deflector is a viable technology for improving optical disk access times.
    • The developed device enables precise optical disk tracking.
    • Advanced fabrication techniques are crucial for realizing integrated acousto-optic devices for data storage applications.