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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 28 — Oct. 1, 2008
  • pp: 5182–5189

Quantitative phase and refractive index analysis of optical fibers using differential interference contrast microscopy

Betty Kouskousis, Daniel J. Kitcher, Stephen Collins, Ann Roberts, and Greg W. Baxter  »View Author Affiliations


Applied Optics, Vol. 47, Issue 28, pp. 5182-5189 (2008)
http://dx.doi.org/10.1364/AO.47.005182


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Abstract

A systematic and straightforward image processing method to extract quantitative phase and refractive index data from weak phase objects is presented, obtained using differential interference contrast (DIC) microscopy. The method is demonstrated on DIC images of optical fibers where a directional integration routine is applied to the DIC images to extract phase and refractive index information using the data obtained across the whole DIC image. By applying the inverse Abel transform to the resultant phase images, an accurate refractive index profile is obtained. The method presented here is compared to the refracted near-field technique, typically used to obtain the refractive index profile of optical fibers, and shows excellent agreement. It is concluded that through careful image processing procedures, DIC microscopy can be successfully implemented to obtain quantitative phase and refractive index information of optical fibers.

© 2008 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2300) Fiber optics and optical communications : Fiber measurements
(070.6110) Fourier optics and signal processing : Spatial filtering
(100.2960) Image processing : Image analysis
(100.5070) Image processing : Phase retrieval
(110.0180) Imaging systems : Microscopy

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 29, 2008
Revised Manuscript: August 1, 2008
Manuscript Accepted: August 28, 2008
Published: September 26, 2008

Citation
Betty Kouskousis, Daniel J. Kitcher, Stephen Collins, Ann Roberts, and Greg W. Baxter, "Quantitative phase and refractive index analysis of optical fibers using differential interference contrast microscopy," Appl. Opt. 47, 5182-5189 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-28-5182

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