Absolute strain measurements with multiplexed low-coherence demodulated fiber Fabry-Perot sensors

Philipp M. Nellen; H. Pierhofer; Rolf Broennimann; Urs J. Sennhauser

doi:10.1117/12.184977

14 September 1994 Absolute strain measurements with multiplexed low-coherence demodulated fiber Fabry-Perot sensors

Philipp M. Nellen, H. Pierhofer, Rolf Broennimann, Urs J. Sennhauser

Proceedings Volume 2360, Tenth International Conference on Optical Fibre Sensors; (1994) https://doi.org/10.1117/12.184977
Event: 10th Optical Fibre Sensors Conference, 1994, Glasgow, United Kingdom

Abstract

Intrinsic fiber optic Fabry-Perots (FP) adhered to the surface of a cantilever beam are used as strain sensors. Low coherence demodulation with a scanning Michelson interferometer (MI) and interfringe resolution techniques allow absolute interrupt-immune measurements of static longitudinal strains with a resolution of a few microstrains. Low reflecting FPs arranged either in parallel or in series can be multiplexed by giving them a difference in their lengths.

Citation Download Citation

Philipp M. Nellen, H. Pierhofer, Rolf Broennimann, and Urs J. Sennhauser "Absolute strain measurements with multiplexed low-coherence demodulated fiber Fabry-Perot sensors", Proc. SPIE 2360, Tenth International Conference on Optical Fibre Sensors, (14 September 1994); https://doi.org/10.1117/12.184977

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