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Proceedings Paper

Compact in-reflection fiber interferometer using thermally expanded core fiber and single-mode fiber and its applications as temperature and refractive index sensors
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Paper Abstract

We propose and experimentally demonstrate a compact in-reflection Mach-Zehnder fiber interferometer and applied the proposed device to temperature and refractive index sensing. By splicing a short section of an uncoated single-mode fiber with a thermally expanded core fiber, we obtained an interference pattern in the reflection spectrum of the device due to the effective index difference between the core mode and the cladding modes of the SMF which can be excited and re-collected due to the mode field mismatch at the splice point. We then demonstrate the use of this interferometer for temperature and refractive index sensing.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75033P (5 October 2009); doi: 10.1117/12.834075
Show Author Affiliations
Linh Viet Nguyen, Gwangju Institute of Science and Technology (Korea, Republic of)
Youngjoo Chung, Gwangju Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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