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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

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High numerical aperture multicomponent glass fiber.

S Shibata, S Mitachi, S Takahashi

    Applied Optics
    |March 12, 2010
    PubMed
    Summary

    High-numerical-aperture (N.A.) optical fibers were developed using barium oxide (BaO) glass, achieving low optical loss (20 dB/km). These fibers offer promising performance for broadband applications, especially with LEDs.

    Area of Science:

    • Materials Science
    • Optical Engineering
    • Glass Science

    Background:

    • Development of optical fibers with high numerical aperture (N.A.) is crucial for efficient light transmission.
    • Achieving low optical loss across a wide wavelength range remains a challenge in fiber optics.

    Purpose of the Study:

    • To fabricate and characterize high-N.A. multicomponent glass fibers with low optical loss.
    • To evaluate the potential of barium oxide (BaO) containing glass for optical fiber applications.
    • To assess the performance of BaO-core/multicomponent-clad glass fibers.

    Main Methods:

    • Fabrication of multicomponent glass fibers with a high numerical aperture (N.A. 0.53).
    • Optical loss measurements in the 0.6-1.3 micrometer wavelength region.

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  • Characterization of N.A. wavelength dependence, effective N.A., bandwidth, and coupling efficiency.

    • Main Results:

    • Successfully obtained high-N.A. (0.53) multicomponent glass fibers with 20 dB/km optical loss.
    • BaO-containing glass demonstrated suitability for high-N.A., low-loss fiber fabrication over a broad wavelength range.
    • BaO-core/multicomponent-clad fibers exhibited low optical loss, minimal N.A. wavelength dependence, high effective N.A., large bandwidth, and high LED coupling efficiency.

    Conclusions:

    • Barium oxide (BaO) is a key component for developing advanced, low-loss, high-N.A. optical fibers.
    • The developed fibers show excellent optical characteristics suitable for various applications, including those utilizing LEDs.
    • These findings pave the way for next-generation optical communication and sensing technologies.