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A novel hollow-glass microsphere sensor for monitoring high hydrostatic pressure

Xu, Ming Gang and Dakin, John P. (1993) A novel hollow-glass microsphere sensor for monitoring high hydrostatic pressure In Fiber Optic and Laser Sensors X. vol. 1795, The International Society for Optical Engineering., pp. 2-7. (doi:10.1117/12.141242).

Record type: Conference or Workshop Item (Paper)


Laboratory prototypes of a novel pressure sensor have been produced using a hollow glass microsphere, bonded, in an on-axis position, to the end of a monomode optical fibre. The sphere surfaces form a low finesse Fabry-Perot interferometer. The construction of the probe is simple in concept, yet the sensing element is intrinsically hermetically sealed. Experimental trials, under the influence of hydraulic pressure have been carried out and show a good match with predicted behaviour. The observed shift in wavelength with pressure was -0.93 nm/MPa, two orders of magnitude higher than that we have measured with a in-fibre-grating sensor under similar conditions. The ratio of the pressure sensitivity to the temperature sensitivity for our microsphere sensor was more than two orders of magnitude better than the in-fibre-grating type, so therefore less compensation is necessary to correct for temperature changes. This new form of sensing probe has potential for many high-pressure sensing applications

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Published date: 1993
Venue - Dates: Fibre Optic and Laser Sensors '92, 1993-01-01


Local EPrints ID: 77358
ISBN: 9780819409744
PURE UUID: 552b84ad-47bc-400f-a8a9-d1979eb5502f

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:33

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Author: Ming Gang Xu
Author: John P. Dakin

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