A dynamic fiber optic strain and power change sensor

Sascha Liehr; Katerina Krebber

doi:10.1117/12.884577

17 May 2011 A dynamic fiber optic strain and power change sensor

Sascha Liehr, Katerina Krebber

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 775351 (2011) https://doi.org/10.1117/12.884577
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

A dynamic and quasi-distributed sensor principle for simultaneous measurement of length changes and optical power changes between reflection points in an optical fiber is presented. The technique is based on the incoherent optical frequency domain reflectometry (I-OFDR). Length change resolutions < 1 μm and measurement repetition rates up to 2 kHz can be achieved using standard single-mode and multi-mode optical fibers. Simultaneous length change and refractive index measurement as well as field test results showing the deformation of a masonry building under seismic load are presented. Promising fields of application for this technique are the structural health monitoring sector and chemical process control.

Citation Download Citation

Sascha Liehr and Katerina Krebber "A dynamic fiber optic strain and power change sensor", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775351 (17 May 2011); https://doi.org/10.1117/12.884577

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