An optical fibre technique for measuring optical absorption by chromophores in the presence of scattering particles

Title
An optical fibre technique for measuring optical absorption by chromophores in the presence of scattering particles
Publication Date
2005
Author(s)
Bunganaen, Y
Lamb, David
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Institute of Physics Publishing Ltd
Place of publication
United Kingdom
DOI
10.1088/1742-6596/15/1/012
UNE publication id
une:8335
Abstract
The evanescent radiation field associated with a suitably-prepared silica optical fibre, whereby the outer cladding has been removed and the core immersed in a liquid, has been investigated for its applicability as a device for measuring the spectral absorption of a liquid containing both chromophore and suspended scattering material. It is found that the evanescent radiation field adjacent to the core-liquid boundary interacts with chromophores in a liquid in much the same way as radiation does when directed, unbound, through a cuvette containing the same liquid in an optical spectrophotometer. However, the small penetration depth of the evanescent field, of the order of one micron, results in a sensor which is found to be insensitive to light-scattering particulate matter than was present in the liquid.
Link
Citation
Journal of Physics: Conference Series, v.15, p. 67-73
ISSN
1742-6596
1742-6588
Start page
67
End page
73

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