Dielectric annular core fiber for optical sensing

Petr Solarik; Zdenek Burian; Ivan Kasik; Vlastimil Matejec; Jan Mrazek; Milos Hayer

doi:10.1117/12.662286

22 April 2006 Dielectric annular core fiber for optical sensing

Petr Solarik, Zdenek Burian, Ivan Kasik, Vlastimil Matejec, Jan Mrazek, Milos Hayer

Proceedings Volume 6189, Optical Sensing II; 61891R (2006) https://doi.org/10.1117/12.662286
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

The paper deals with a special type of sensing optical fiber, the annular core fiber. This fiber is composed of a narrow annular low-loss glass optical core and glass optical cladding which are applied onto the inner wall of a silica capillary. In the paper transmission characteristics are determined theoretically from the solution of the Helmholtz equation as well as experimentally from measurements of the near field and angular distributions of the output power from the fiber excited by an inclined collimated beam. The sensitivity of the fiber to gaseous toluene is determined under the excitation of the fiber by an inclined beam at 670 nm, when refractive-index changes in the evanescent field are responsible for the sensitivity. These measurements are compared with those carried out with reference capillary silica fibers and PCS fibers. It is shown that the annular core fibers have the highest sensitivity in comparison with the reference fibers. A detection limit of 0.06 % can be determined from the sensitivity measurements.

Citation Download Citation

Petr Solarik, Zdenek Burian, Ivan Kasik, Vlastimil Matejec, Jan Mrazek, and Milos Hayer "Dielectric annular core fiber for optical sensing", Proc. SPIE 6189, Optical Sensing II, 61891R (22 April 2006); https://doi.org/10.1117/12.662286

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