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Proceedings Paper

Silica and plastic optical fibers with tapered core profile for enhanced evanescent-wave absorption spectroscopy of liquids
Author(s): Riccardo Falciai; Anna Grazia Mignani; Leonardo Ciaccheri; Franco Cosi
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Paper Abstract

Multimode optical fibers are used for evanescent-wave absorption spectroscopy ofliquids by replacing, to some extent, the normal cladding with the media being tested. Plastic-cladding silica-core fibers and all-plastic fibers are frequently used for evanescent-wave absorption-spectroscopy of liquids, since the plastic cladding can be easily removed. However, these fibers offer only limited efficiency. This paper presents tapered-core PCS and all-plastic fibers with enhanced sensitivitycompared to uniform-core fibers, and discusses how the enhancement of absorbance is influenced by the parameters characterizing the taper profile.

Paper Details

Date Published: 12 January 1998
PDF: 3 pages
Proc. SPIE 3278, Integrated Optic Devices II, (12 January 1998); doi: 10.1117/12.298204
Show Author Affiliations
Riccardo Falciai, Istituto di Ricerca sulle Onde Elettromagnetiche/CNR (Italy)
Anna Grazia Mignani, Istituto di Ricerca sulle Onde Elettromagnetiche/CNR (Italy)
Leonardo Ciaccheri, Istituto di Ricerca sulle Onde Elettromagnetiche/CNR (Italy)
Franco Cosi, Istituto di Ricerca sulle Onde Elettromagnetiche/CNR (Italy)

Published in SPIE Proceedings Vol. 3278:
Integrated Optic Devices II
Giancarlo C. Righini; S. Iraj Najafi; Bahram Jalali, Editor(s)

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