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12 January 1998 Silica and plastic optical fibers with tapered core profile for enhanced evanescent-wave absorption spectroscopy of liquids
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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