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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 8 — Apr. 21, 2014
  • pp: 8908–8918

The influence of optical fiber bundle parameters on the transmission of laser speckle patterns

Jing Wang and Seemantini K. Nadkarni  »View Author Affiliations

Optics Express, Vol. 22, Issue 8, pp. 8908-8918 (2014)

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Laser speckle imaging (LSI) techniques provide important functional information about tissue perfusion and mechanical properties. To perform LSI in vivo, laser speckle patterns are transmitted via optical fiber bundles incorporated within small-diameter endoscopes. Inter-fiber crosstalk due to mode coupling in fiber bundles can result in erroneous speckle statistics and therefore reduces the accuracy of LSI analysis. In this paper, we investigate the influence of multiple parameters that influence crosstalk between neighboring cores within optical fiber bundles and govern the modulation of transmitted laser speckle patterns. Our results show that in addition to large core-to-core separation, large refractive index contrast between core and cladding material, reduced number of propagating modes and variability in core size are essential parameters for accurate speckle pattern transmission to conduct endoscopic LSI.

© 2014 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(060.2350) Fiber optics and optical communications : Fiber optics imaging
(060.2400) Fiber optics and optical communications : Fiber properties
(110.6150) Imaging systems : Speckle imaging
(170.2150) Medical optics and biotechnology : Endoscopic imaging

ToC Category:
Fiber Optics

Original Manuscript: January 6, 2014
Revised Manuscript: March 11, 2014
Manuscript Accepted: March 24, 2014
Published: April 7, 2014

Virtual Issues
Vol. 9, Iss. 6 Virtual Journal for Biomedical Optics

Jing Wang and Seemantini K. Nadkarni, "The influence of optical fiber bundle parameters on the transmission of laser speckle patterns," Opt. Express 22, 8908-8918 (2014)

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