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Proceedings Paper

The working condition of a short section of optical capillary in multi-parameters heads for lab-on-fiber application
Author(s): Michal Borecki; Michael L. Korwin-Pawlowski; Maria Beblowska
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Paper Abstract

This paper presents the proposition of a novel integration method of multi-parameter heads to be used for examination of liquids with short sections of locally heated optical capillaries. The first implementation of the proposed method concerns is a light source fiber and a detection fiber inserted into the capillary hole. In such a setup the local heating causes switching of the hole modes into the tube modes. Therefore, unlike other well-known fiber optical sensors for liquids that utilize spectral information of the index of refraction and optical signal attenuation, the short section capillary method takes advantage of additional information originating from surface tension, viscosity, boiling point, vapor pressure of liquid and its heat capacity. The setup with fibers can be easily used in a laboratory environment. For an in-situ application such construction is not recommended, because introducing the fiber into the capillary can generate small vapor bubbles. Therefore, direct side coupling of the capillary and a semiconductor light source is needed. We show that the hole modes excitation is possible with satisfactory working parameters when soda glass capillaries are preconditioned using a relatively simple technique.

Paper Details

Date Published: 6 November 2008
PDF: 6 pages
Proc. SPIE 7124, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2008, 71240C (6 November 2008); doi: 10.1117/12.817940
Show Author Affiliations
Michal Borecki, Warsaw Univ. of Technology (Poland)
Michael L. Korwin-Pawlowski, Univ. du Québec en Outaouais (Canada)
Maria Beblowska, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 7124:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2008
Ryszard S. Romaniuk; Tomasz R. Wolinski, Editor(s)

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