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Proceedings Paper

High-precision confocal reflection measurement for two dimensional refractive index mapping of optical fibers
Author(s): Philippe Raisin; Jonas Scheuner; Valerio Romano; Manuel Ryser
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Paper Abstract

We introduce a new fiber-optical approach for reflection based refractive index mapping. Our approach leads to improved stability and reliability over existing free-space confocal instruments and significantly cuts alignment efforts and reduces the number of components needed. Other than properly cleaved fiber end-faces, this setup requires no additional sample preparation. The instrument is calibrated by means of a set of samples with known refractive indices. The index steps of commercially available fibers are measured accurately down to < 10-3. The precision limit of the instrument is currently of the order of 10-4.

Paper Details

Date Published: 7 May 2015
PDF: 6 pages
Proc. SPIE 9507, Micro-structured and Specialty Optical Fibres IV, 95070O (7 May 2015); doi: 10.1117/12.2180988
Show Author Affiliations
Philippe Raisin, Univ. Bern (Switzerland)
Jonas Scheuner, Univ. Bern (Switzerland)
Valerio Romano, Univ. Bern (Switzerland)
Berner Univ. of Applied Sciences (Switzerland)
Manuel Ryser, Univ. Bern (Switzerland)

Published in SPIE Proceedings Vol. 9507:
Micro-structured and Specialty Optical Fibres IV
Kyriacos Kalli; Jiri Kanka; Alexis Mendez, Editor(s)

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