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Proceedings Paper

Dielectric annular core optical fiber for chemical trace analysis
Author(s): Petr Solarik; Zdenek Burian; Ivan Kasik
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Paper Abstract

Use of annular core fiber (ACF) for chemical trace analysis is novel approach in the field of evanescent wave optical sensors. It allows extending the sensitivity of conventional absorbance spectroscopy by extending optical interaction path length of evanescent wave. ACF is waveguide, typically consisting of small diameter tubes capable of guiding light through a sample by evanescent wave. AFC waveguides are capillaries that contain a liquid or gas sample for spectroscopic analysis. The core of doubly clad step index optical fiber is a dielectric annulus lying between two different claddings. Benefit of this solution is possibility to use of small volume samples, long path lengths by constraining light propagation within a liquid or gas medium by evanescent wave. Preform preparation by MCVD process and fiber drawing and coating of this special capillary structure have been realized in the workplace of IREE AS CR. Primary shielding of silica capillary is ultraviolet radiation activated acrylic copolymer. Basic optical characteristic were measured - attenuation, refractive index (RI) profile, loss spectral distribution, near field intensity distribution.

Paper Details

Date Published: 18 April 2006
PDF: 5 pages
Proc. SPIE 6180, Photonics, Devices, and Systems III, 618015 (18 April 2006); doi: 10.1117/12.675692
Show Author Affiliations
Petr Solarik, Czech Technical Univ. in Prague (Czech Republic)
Zdenek Burian, Czech Technical Univ. in Prague (Czech Republic)
Ivan Kasik, Institute of Radio Engineering and Electronics (Czech Republic)


Published in SPIE Proceedings Vol. 6180:
Photonics, Devices, and Systems III
Pavel Tománek; Miroslav Hrabovský; Miroslav Miler; Dagmar Senderákova, Editor(s)

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