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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 13 — May. 1, 1998
  • pp: 2598–2607

Fiber-diameter measurement by occlusion of a Gaussian beam

Duncan J. Butler and G. W. Forbes  »View Author Affiliations


Applied Optics, Vol. 37, Issue 13, pp. 2598-2607 (1998)
http://dx.doi.org/10.1364/AO.37.002598


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Abstract

The amount of light occluded by a fiber as it passes through a laser beam can be used as the basis for fiber-diameter measurement. This technique is analyzed with a two-dimensional rigorous model. The occlusion seen for dielectric fibers as a function of their diameter is highly oscillatory owing to interference between the light transmitted by the fiber and the rest of the diffracted field. Scalar diffraction theory is shown to be adequate in modeling this effect. The oscillation sets a limit to the accuracy of simple diameter measurement systems and is confirmed experimentally for glass fibers. However, wool fibers are found to be better treated as an absorbing material. The effect of beam polarization is investigated and found to be negligible for dielectric fibers but significant for metal fibers of small diameter.

© 1998 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(060.2280) Fiber optics and optical communications : Fiber design and fabrication

History
Original Manuscript: September 24, 1997
Published: May 1, 1998

Citation
Duncan J. Butler and G. W. Forbes, "Fiber-diameter measurement by occlusion of a Gaussian beam," Appl. Opt. 37, 2598-2607 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-13-2598

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