Two-loop based low-coherence multiplexing fiber optic sensors network with Michelson optical path demodulator

Libo Yuan; Jun Yang

doi:10.1117/12.623252

23 May 2005 Two-loop based low-coherence multiplexing fiber optic sensors network with Michelson optical path demodulator

Libo Yuan, Jun Yang

Author Affiliations +

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623252
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

A two-loop based low-coherence multiplexing fiber optic sensors network has been proposed and demonstrated. It is greatly extended the multiplexing capacity of this kind sensor. A practical implementation of theses schemes is configured by use of a popular ASE light source and standard single mode fiber, which are commonly used in communication industry. The sensors two-loop topology is completely passive. The absolute length measurements can be obtained for each sensing fiber segments so that it can be used to measure quasi-distribution strain or temperature. For the large-scale smart structures, this technique not only extends the multiplexing potential, but also provides a redundancy for the sensing system. It is mean that the two-loop sensors network permits one point or two points breakdown, because the sensing system will still work whenever the embedded two-looped sensors has been destroyed in somewhere. The robustness of the 9-sensor two-loop sensing network are investigated and discussed.

Citation Download Citation

Libo Yuan and Jun Yang "Two-loop based low-coherence multiplexing fiber optic sensors network with Michelson optical path demodulator", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623252

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