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. Fibre Optic and Laser Sensors '92 Bellingham, US, The International Society for Optical Engineering, 2-7. (Proceedings of SPIE, 1795). (doi:10.1117/12.141242).


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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

Item Type: Book Section
Digital Object Identifier (DOI): doi:10.1117/12.141242
ISBNs: 9780819409744
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 77358
Accepted Date and Publication Date:
2 June 1992Delivered
Date Deposited: 11 Mar 2010
Last Modified: 31 Mar 2016 13:11
URI: http://eprints.soton.ac.uk/id/eprint/77358

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