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Characterization of single and double fiber-coupled diffusing spheres.

Jung-Rae Park1, William R Donaldson, Robert Boni

  • 1Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299, USA. park@lle.rochester.edu

Applied Optics
|August 3, 2004
PubMed
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This study characterized a fiber-optic sensor for large-area omnidirectional measurements. The dual-sphere design provided a more uniform response compared to a bare fiber, enhancing UV transport efficiency measurements.

Area of Science:

  • Optical Engineering
  • Sensor Technology
  • Metrology

Background:

  • Characterization of fiber-optic sensors is crucial for accurate optical measurements.
  • Omnidirectional sensors are needed for comprehensive light detection.
  • Integrating spheres are common tools for optical measurements but can have limitations.

Purpose of the Study:

  • To characterize a fiber-optic sensor with a spherical ceramic tip for large-area omnidirectional sensing.
  • To evaluate the sensor's performance in measuring UV transport efficiency.
  • To compare the sensor's response with a bare fiber configuration.

Main Methods:

  • A fiber-optic sensor with and without a spherical ceramic tip was inserted into a Spectralon sphere.
  • An optical transport measurement system was designed to rotate the sphere about two axes.

Related Experiment Videos

  • UV transport efficiency at 351 nm was measured with an f-6 cone angle.

    • Main Results:

    • A bare fiber at the center showed forward-biased detection sensitivity.
    • Withdrawing the bare fiber shifted the peak sensitivity from front to back.
    • The dual-sphere sensor exhibited a more uniform response function across angles of incidence compared to the bare fiber.

    Conclusions:

    • The fiber-optic sensor with a spherical ceramic tip functions effectively as a large-area omnidirectional sensor.
    • The dual-sphere configuration significantly improves the uniformity of the angular response.
    • This sensor design is advantageous for accurate UV transport efficiency measurements.