Chemically tapered silver halide fibers: an approach for increasing the sensitivity of mid-infrared evanescent wave sensors

M. Karlowatz*, M. Kraft, E. Eitenberger, B. Mizaikoff, A. Katzir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this work an innovative etching technique for tapering silver halide fibers is introduced. As silver halides form soluble complexes with thiosulfate in aqueous solution, the fiber can be chemically tapered by an etching process, which also warrants a high quality of the fiber surface. The evanescent field sensitivity of thus obtained tapered fibers was raised by more than one order of magnitude, demonstrated by calibration curves of tetrachloroethylene in hexane recorded with a tapered sensor fiber coupled to a Fourier transform infrared (FT-IR) spectrometer.

Original languageEnglish
Pages (from-to)1629-1633
Number of pages5
JournalApplied Spectroscopy
Volume54
Issue number11
DOIs
StatePublished - Nov 2000

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