Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 377, Issue -, Pages 217-219Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2012.12.026
Keywords
Microstructured exposed-core fiber; Sensors; Chalcogenide glasses
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Chemical bonds of most of the molecules vibrate at a frequency corresponding to the near or mid infrared field. It is thus of a great interest to develop sensitive and portable devices for the detection of specific chemicals and biomolecules for various applications in health, environment, security and so on. A microstructured exposed-core (MEC) fiber has been elaborated for the first time. This design consists of a chalcogenide glass optical fiber with a suspended micron-scale core that is partially exposed to the external environment. This configuration has been chosen to elaborate, using the molding method, a chalcogenide fiber for chemical species detection. The sensitivity of this fiber to detect molecules such as acetone and propan-2-ol has been compared with those of single index fibers. Although evanescent wave absorption is inversely proportional to the fiber diameter, the results show that an exposed-core fiber is more sensitive than a single index fiber having a twice smaller diameter. (C) 2012 Elsevier B.V. All rights reserved.
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