Distributed perfluorinated POF strain sensor using OTDR and OFDR techniques

Sascha Liehr; Mario Wendt; Katerina Krebber

doi:10.1117/12.835331

5 October 2009 Distributed perfluorinated POF strain sensor using OTDR and OFDR techniques

Sascha Liehr, Mario Wendt, Katerina Krebber

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75036G (2009) https://doi.org/10.1117/12.835331
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

This paper presents the latest advances in distributed strain sensing using perfluorinated (PF) polymer optical fibers (POF). Compared to previously introduced PMMA POF strain sensors, PF POF have the advantage of lower loss and therefore extended measurement length of more than 500 m at increased spatial resolution of 10 cm. It is shown that PF POF can measure strain distributed up to 100 %. The characteristic backscatter signature of this fiber type provides additional evaluation possibilities. We show that, by applying a cross-correlation algorithm to the backscatter signal, the distributed length change can be measured along the fiber. We also present, to our knowledge for the first time, incoherent Optical Frequency Domain Reflectometry (OFDR) in POF to measure distributed reflections and loss along the fiber. The OFDR technique proves superior to existing OTDR techniques in measurement speed, resolution and potential instrument costs.

Citation Download Citation

Sascha Liehr, Mario Wendt, and Katerina Krebber "Distributed perfluorinated POF strain sensor using OTDR and OFDR techniques", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75036G (5 October 2009); https://doi.org/10.1117/12.835331

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