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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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Related Experiment Video

Updated: Jun 8, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
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Integrated optic grating-coupler-based optical head.

T A Strasser, M C Gupta

    Applied Optics
    |September 24, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an integrated optical recording head using grating couplers, simplifying alignment and reducing components compared to traditional optical heads. It demonstrates effective signal retrieval for optical data storage.

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    Area of Science:

    • Optoelectronics
    • Optical Engineering
    • Materials Science

    Background:

    • Conventional optical recording heads utilize bulk optics, leading to complex alignment and numerous components.
    • Miniaturization and integration are key challenges in developing advanced optical data storage systems.

    Purpose of the Study:

    • To present an integrated optic grating-coupler-based optical recording head.
    • To demonstrate the feasibility of a simplified optical head design with improved alignment characteristics.

    Main Methods:

    • Development of an optical recording head integrating grating couplers on a single substrate.
    • Utilizing a grating to a tapered film waveguide for signal coupling.
    • Experimental acquisition of radio frequency (RF), radial tracking, and focus error signals.

    Main Results:

    • The integrated grating-coupler head exhibits fewer components and easier alignment than bulk-optics designs.
    • Exemplary RF signals, radial tracking, and focus error signals were successfully obtained.
    • Demonstrated the potential for a compact and efficient optical head design.

    Conclusions:

    • The proposed grating-coupler-based optical recording head offers a simplified and more easily aligned alternative to conventional systems.
    • This integrated approach is promising for next-generation optical data storage devices.