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, 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:	05 Dec 2022 14:51
Publisher DOI:	10.1117/12.2180988
URI:	https://boris.unibe.ch/id/eprint/74978