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

Kalli, Kyriacos; Kanka, Jiri; Mendez, Alexis; Raisin, Philippe Richard; Scheuner, Jonas; Romano, Valerio; Ryser, Manuel (2015). High-precision confocal reflection measurement for two dimensional refractive index mapping of optical fibers. Proceedings of SPIE - International Society for Optical Engineering, 9507, 95070O. SPIE 10.1117/12.2180988

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Lasers

UniBE Contributor:

Raisin, Philippe Richard; Romano, Valerio and Ryser, Manuel

Subjects:

500 Science
500 Science > 530 Physics
600 Technology > 620 Engineering

ISSN:

0277-786X

Publisher:

SPIE

Language:

English

Submitter:

Martin Frenz-Lips

Date Deposited:

08 Feb 2016 14:57

Last Modified:

08 Feb 2016 14:57

Publisher DOI:

10.1117/12.2180988

URI:

https://boris.unibe.ch/id/eprint/74978

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