Silica and plastic optical fibers with tapered core profile for enhanced evanescent-wave absorption spectroscopy of liquids

Riccardo Falciai; Anna Grazia Mignani; Leonardo Ciaccheri; Franco Cosi

doi:10.1117/12.298204

12 January 1998 Silica and plastic optical fibers with tapered core profile for enhanced evanescent-wave absorption spectroscopy of liquids

Riccardo Falciai, Anna Grazia Mignani, Leonardo Ciaccheri, Franco Cosi

Author Affiliations +

Proceedings Volume 3278, Integrated Optic Devices II; (1998) https://doi.org/10.1117/12.298204
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

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.

Citation Download Citation

Riccardo Falciai, Anna Grazia Mignani, Leonardo Ciaccheri, and Franco Cosi "Silica and plastic optical fibers with tapered core profile for enhanced evanescent-wave absorption spectroscopy of liquids", Proc. SPIE 3278, Integrated Optic Devices II, (12 January 1998); https://doi.org/10.1117/12.298204

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