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Applied Optics

Applied Optics


  • Vol. 44, Iss. 3 — Jan. 20, 2005
  • pp: 316–327

Microinterferometric optical phase tomography for measuring small, asymmetric refractive-index differences in the profiles of optical fibers and fiber devices

Brent L. Bachim and Thomas K. Gaylord  »View Author Affiliations

Applied Optics, Vol. 44, Issue 3, pp. 316-327 (2005)

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A new technique, microinterferometric optical phase tomography, is introduced for use in measuring small, asymmetric refractive-index differences in the profiles of optical fibers and fiber devices. The method combines microscopy-based fringe-field interferometry with parallel projection-based computed tomography to characterize fiber index profiles. The theory relating interference measurements to the projection set required for tomographic reconstruction is given, and discrete numerical simulations are presented for three test index profiles that establish the technique’s ability to characterize fiber with small, asymmetric index differences. An experimental measurement configuration and specific interferometry and tomography practices employed in the technique are discussed.

© 2005 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(110.6960) Imaging systems : Tomography
(180.3170) Microscopy : Interference microscopy

Original Manuscript: February 9, 2004
Revised Manuscript: October 6, 2004
Manuscript Accepted: October 8, 2004
Published: January 20, 2005

Brent L. Bachim and Thomas K. Gaylord, "Microinterferometric optical phase tomography for measuring small, asymmetric refractive-index differences in the profiles of optical fibers and fiber devices," Appl. Opt. 44, 316-327 (2005)

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