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Microscopy Used to Profile Refractive Index

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Michael A. Greenwood

A microscopy technique that measures the refractive index profile of an optical waveguide has been devised by researchers in Taiwan. An accurate profile is used, in turn, to determine the mode properties of the waveguide, which are important in several applications, including optical fibers used for communication and in integrated optical devices. An existing method for refractive index profiling uses an objective lens and a CCD camera. This approach, however, has several shortcomings. Most importantly, the high-frequency noise in the measurement makes it nearly impossible to take the...Read full article

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    Published: October 2007
    Glossary
    optical waveguide
    Any structure having the ability to guide the flow of radiant energy along a path parallel to its axis and to contain the energy within or adjacent to its surface.
    refractive index profile
    The description of the refractive index along a fiber diameter.
    Basic ScienceFeaturesindustrialMicroscopymicroscopy techniqueoptical waveguiderefractive index profile

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