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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 2 — Jan. 28, 2013
  • pp: 2408–2413

Capturing a reflective cross-sectional image of an optical fiber with partially coherent laser light to measure the refractive index profile of a multimode optical fiber

Fang-Wen Sheu and Heng-Jian Jhang  »View Author Affiliations

Optics Express, Vol. 21, Issue 2, pp. 2408-2413 (2013)

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We focused partially coherent laser light onto an optical fiber end-face and captured a high-quality reflective cross-sectional image of the fiber. By analyzing the reflected light intensity distribution of the captured fiber image, we can achieve refractive-index profiling of a step-index multimode optical fiber. The measurement error caused by the reflected light from the other fiber end-face positioned in air can be greatly improved by inserting that end of the fiber into water. This simple and easy technique for fiber index profiling by employing reduced-coherence laser light is very useful in determining the refractive index profiles of various multimode optical fibers.

© 2013 OSA

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2350) Fiber optics and optical communications : Fiber optics imaging
(140.3300) Lasers and laser optics : Laser beam shaping

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 12, 2012
Revised Manuscript: December 29, 2012
Manuscript Accepted: January 6, 2013
Published: January 24, 2013

Fang-Wen Sheu and Heng-Jian Jhang, "Capturing a reflective cross-sectional image of an optical fiber with partially coherent laser light to measure the refractive index profile of a multimode optical fiber," Opt. Express 21, 2408-2413 (2013)

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