High-precision confocal reflection measurement for two dimensional refractive index mapping of optical fibers

Philippe Raisin; Jonas Scheuner; Valerio Romano; Manuel Ryser

doi:10.1117/12.2180988

7 May 2015 High-precision confocal reflection measurement for two dimensional refractive index mapping of optical fibers

Philippe Raisin, Jonas Scheuner, Valerio Romano, Manuel Ryser

Author Affiliations +

Proceedings Volume 9507, Micro-structured and Specialty Optical Fibres IV; 95070O (2015) https://doi.org/10.1117/12.2180988
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

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.

Citation Download Citation

Philippe Raisin, Jonas Scheuner, Valerio Romano, and Manuel Ryser "High-precision confocal reflection measurement for two dimensional refractive index mapping of optical fibers", Proc. SPIE 9507, Micro-structured and Specialty Optical Fibres IV, 95070O (7 May 2015); https://doi.org/10.1117/12.2180988

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