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Applied Optics and Photonics Research

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High Resolution Pressure Sensors

Martin Smith, Bill MacPherson, Robert Maier



Pressure measurement in industrial environments is commonplace.  However there remains instances where commerciall sensors are unsuitable in terms of spatial resolution, safety, or resolution.  This work explores the possibility of using optical fibre interrogation of pressure sensors in which the overall measurement is a function of the difference between two or more individual sensors. The project involves the design and manufacture of sensing elements to measure pressure, displacement, and movement at multiple positions, with the aim to develop a scheme capable of offering performance unattainable for differential measurements at present.

Recent work has involved the design and testing of an interrogation scheme involving a Fabry-Perot etalon, in which a cavity was formed between a fibre end and a deformable diaphragm.


This project is supported by Rolls Royce.


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