What is it about?
This is a fiber optic sensor into a shape of a cable, capable of transferring the external pressure into strain exerted into the integrated optical fibers. Any distributed optical fiber sensor system capable of measuring the strain (e.g. OFDR, BOxDA o BOxDR) can be, therefore, used to interrogate the cable to measure the pressure. The design allows a very effective pressure-to-strain transducing making the cable very sensive (it can detect variation of 100 Pa or even less). At the same time, the design allows to customize sensitivity and dynamic range to some extent.
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Photo by Rodion Kutsaev on Unsplash
Why is it important?
At the moment, there is no example of distributed fiber optic pressure sensors with such sensitivity and compatible with standard strain distributed optical fiber sensor system.
Perspectives
We think that the design can be of some interest to cable manufacturers. Other researchers may be inspired by the design and by the way mechanical transferring can be used for sensing.
Dr Luca Schenato
National Research Council Italy
Read the Original
This page is a summary of: An optical fibre cable for distributed pressure sensing: a proof of concept, August 2019, SPIE,
DOI: 10.1117/12.2539832.
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