Specialty fibers for fiber optic sensor application

Bennett, Kevin; Koh, Joohyun; Coon, Jeffery; Chien, Ching-Kee; Artuso, A.; Chen, X.; Nolan, Daniel A.; Li, M.-J.

doi:10.1117/12.750087

Cited by 2 publications

(1 citation statement)

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“…However, they have also been employed for the development of fiber lasers and amplifiers (Limpert et al 2007;Kurkov and Dianov 2004), fiber-optic sensors of physical quantities and chemical or biological substances (Bennett et al 2007;Korostynska et al 2008;Grattan and Meggitt 1999;Baldini et al 2006;Boisde and Harmer 1996), in near-field microscopy (Pohl and Daniel 1993;Kaupp 2006), etc. Fiber-optic chemical and biological sensors have a number of advantages such as small diameters, long lengths, dielectric and fireproof characteristics.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis and Preparation of Tapered Suspended Core Microstructure Fibers

Martan

Kaňka

Kašík

et al. 2009

International Journal of Optomechatronics

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Suspended core microstructured optical fibers (SC-MOFs) represent a special kind of microstructured fibers which can be employed for optical sensing. In this article one experimental SC-MOF and its tapers were numerically analyzed in order to determine if the overlap of evanescent waves with the fiber cladding holes can be increased by tapering. Power distributions of fundamental modes in the SC-MOF and its tapers were calculated by using a vectorial finite element method. The calculations have shown that the evanescent wave overlap (at a wavelength of 1550 nm) can be increased from 0.75% up to 26% by tapering of a section of the SC-MOF from an original diameter of 125 m down to 31.25 m. Fiber tapers designed on the basis of the numerical analysis were prepared by so-called 'flame brush technique' employing a fiber puller of own construction. Experiments with the prepared tapers have proved that the cladding holes remain sufficiently large for passing liquid and gas analytes through and that the core diameter of the untapered pigtails is large enough for low-loss coupling of optical beams into the tapered fiber.

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